Skip to main content

Multilingualism as a Resource: Implications for Education

  • Chapter
  • First Online:
Towards an Integrative Psychological Science

Abstract

Research on cognitive consequences of bi-/multilingualism, including Indian studies, shows that multilingualism is a human resource. Analysis of psycholinguistic processes underlying multilingualism confirms its positive benefits in respect of cognition, creativity, metalinguistic ability, reading and literacy-related skills despite some variations in the performance of the multilinguals under different tasks conditions. Complexities and challenges of negotiating multiple linguistic systems add to the plasticity of brain functions, strengthen executive control and cognitive flexibility and make multilinguals resilient to cognitive conflicts and pressures. The chapter discusses educational implications of the relationship between multilingualism and aspects of cognition, metalinguistic reflections and processes of acquisition of literacy. It is argued that education in a multilingual society like India must promote multilingual competence through development of early literacy and a strong foundation in mother tongue (MT). Evaluation of MT-based multilingual education (MLE) programmes shows positive impact on educational achievement and empowerment of linguistic minorities and Indigenous Tribal Minority communities. Studies also show that the longer the MT is used as the medium of instruction the better is children’s classroom achievement and development of competence in dominant languages like English. Neglect of MT in early education of tribal children in India is related to educational failure, high push-out rate, capability deprivation and poverty. MT-based MLE is quality education for all; it is particularly needed for tribal and linguistic minority children in India for better education and empowerment.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 129.00
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 169.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD 169.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

References

  • Adesope, O. O., Levin, T., Thompson, T., & Ungerleider, C. (2010). A systematic review and meta analysis of the cognitive correlates of bilingualism. Review of Educational Research, 80, 207–245.

    Article  Google Scholar 

  • Annamalai, E. (2008). Contexts of multilingualism. In B. B. Kachru, Y. Kachru, & S. N. Sridhar (Eds.), Language in South Asia (pp. 223–234). Cambridge University Press.

    Chapter  Google Scholar 

  • Bain, B., & Yu, A. (1978). Towards an integration of Piaget and Vygotsky: A cross-cultural replication (France, Germany, Canada) concerning cognitive consequences of bilinguality. In M. Paradis (Ed.), Aspects of bilingualism (pp. 113–126). Hornbeam Press.

    Google Scholar 

  • Baker, C. (2011). Foundations of bilingual education and bilingualism (5th ed.). Multilingual Matters.

    Google Scholar 

  • Bassetti, B. (2013). Bilingualism and writing systems. In T. K. Bhatia, & W. C. Ritchie (Eds.), Handbook of bilingualism and multilingualism (2nd ed., pp.649–670). Wiley-Blackwell.

    Google Scholar 

  • Ben-Zeev, S. (1972). The influence of bilingualism on cognitive development and cognitive strategy. Unpublished Doctoral Dissertation, University of Chicago.

    Google Scholar 

  • Ben-Zeev, S. (1977a).The influence of bilingualism on cognitive development and cognitive strategy. Child Development, 48, 1009–1018.

    Google Scholar 

  • Ben-Zeev, S. (1977b). Mechanisms by which childhood bilingualism affects understanding of language and cognitive structures. In P. A. Hornby (Ed.), Bilingualism: Psychological, social and educational implications (pp. 29–55). Academic Press.

    Google Scholar 

  • Bialystok, E., & Luk, G. (2007) The universality of symbolic representation for reading in Asian and alphabetic languages. Bilingualism: Language and Cognition, 10, 121–129.

    Google Scholar 

  • Bialystok, E. (2013). Impact of bilingualism on language and literacy development. In T. K. Bhatia, & W. C. Ritchie (Eds.), Handbook of bilingualism and multilingualism (2nd ed., pp. 624–648). Wiley-Blackwell.

    Google Scholar 

  • Bialystok, E., & Barac, R. (2013). Cognitive effects. In F. Grosjean, & P. Li (Eds.), The psycholinguistics of bilingualism (pp. 192–213). Wiley-Blackwell.

    Google Scholar 

  • Bialystok, E. (1986). Children’s concept of word. Journal of Psycholinguistic Research, 15, 13–32.

    Article  Google Scholar 

  • Bialystok, E. (1986). Factors in the growth of linguistic awareness. Child Development, 57, 498–510.

    Article  Google Scholar 

  • Bialystok, E. (1988). Levels of bilingualism and levels of linguistic awareness. Developmental Psychology, 24, 560–567.

    Article  Google Scholar 

  • Bialystok, E. (1997). Effects of bilingualism and biliteracy on children’s emerging concepts of print. Developmental Psychology, 33, 429–440.

    Article  PubMed  Google Scholar 

  • Bialystok, E. (2001). Bilingualism in development: Language, literacy and cognition. Cambridge University Press.

    Book  Google Scholar 

  • Bialystok, E., Craik, F. I. M., & Freedman, M. (2007). Bilingualism as a protection against the onset of symptoms of dementia. Neuropsychologia, 45, 459–464.

    Article  PubMed  Google Scholar 

  • Bialystok, E., Craik, F. I. M., & Luk, G. (2012). Bilingualism: Consequences for mind and brain. Trends in Cognitive Sciences, 16(4), 240–250.

    Article  PubMed  PubMed Central  Google Scholar 

  • Bialystok, E., & Majumder, S. (1998). The relationship between bilingualism and the development of cognitive processes in problem-solving. Applied Psycholinguistics, 19, 69–85.

    Article  Google Scholar 

  • Bialystok, E., McBride-Chang, C., & Luk, G. (2005). Bilingualism, language proficiency and learning to read in two writing systems. Journal of Educational Psychology, 97, 580–590.

    Article  Google Scholar 

  • Blumenfeld, H., & Marian, V. (2007). Constraints on parallel language activation in bilingual spoken language processing: Examining proficiency and lexical status using eye-tracking. Language and Cognitive Processes, 22, 633–660.

    Article  Google Scholar 

  • Blumenfeld, H., & Marian, V. (2011). Bilingualism influences inhibitory control in auditory comprehension. Cognition, 118, 245–257.

    Google Scholar 

  • Bruck, M., & Genesee, F. (1995). Phonological awareness in young second language learners. Journal of Child Language, 22, 307–324.

    Article  PubMed  Google Scholar 

  • Carlisle, J. F., Vihman, M., Davis, L. H., & Spharim, G. (1999). Relationship of metalinguistic capabilities and reading achievement of children who are becoming bilingual. Applied Psycholinguistics, 20, 459–478.

    Article  Google Scholar 

  • Craik, F. I. M., Bialystok, E., & Fredman, M. (2010). Delaying the onset of Alzheimer’s disease: Bilingualism as a form of cognitive reserve. Neurology, 75, 1726–1729.

    Article  PubMed  PubMed Central  Google Scholar 

  • Cromdal, J. (1999). Childhood bilingualism and metalinguistic skills: Analysis and control in young Swedish-English bilinguals. Applied Psycholinguistics, 20, 1–20.

    Article  Google Scholar 

  • Cummins, J. (2009). Fundamental psychological and sociological principles underlying educational success for linguistic minority students. In A. K. Mohanty, M. Panda, R. Phillipson, & T. Skutnabb-Kangas (Eds.), Multilingual education for social justice: Globalising the local (pp. 21–35). Orient BlackSwan.

    Google Scholar 

  • Cummins, J. (1978). Bilingualism and the development of metalinguistic awareness. Journal of Cross-Cultural Psychology, 9, 131–149.

    Article  Google Scholar 

  • Cummins, J. (1979). Linguistic interdependence and the educational development of bilingual children. Review of Educational Research, 49, 222–251.

    Article  Google Scholar 

  • Cummins, J., & Gulutsan, M. (1974). Some effects of bilingualism on cognitive functioning. In S. Carey (Ed.), Bilingualism, biculturalism and education (pp. 126–136). University of Alberta Press.

    Google Scholar 

  • Dash, T., & Kar, B. R. (2014). Bilingual language control and general purpose cognitive control among individuals with bilingual aphasia: Evidence based on negative priming and Flanker tasks. Behavioural Neurology, 2014, 1–20.

    Article  Google Scholar 

  • Davidson, R. G., Kline, S. B., & Snow, C. E. (1986). Definitions and definite noun phrases: Indicators of children’s decontextualized language skills. Journal of Research in Childhood Education, 1, 37–47.

    Article  Google Scholar 

  • Devy, G. (Chief Editor) (2014). The being of Bhasa: General introduction to the people’s linguistic survey of India, Volume 1—Part II (in English). Orient Blackswan.

    Google Scholar 

  • Durgunoglu, A. Y., Nagy, W. E., & Hancin-Bhatt, B. J. (1993) Cross-language transfer of phonological awareness. Journal of Educational Psychology, 85, 453–465.

    Google Scholar 

  • Edwards, D., & Christopherson, H. (1988). Bilingualism, literacy and metalinguistic awareness in preschool children. British Journal of Developmental Psychology, 6, 235–244.

    Article  Google Scholar 

  • Eviatar, Z., & Ibrahim, R. (2000). Bilingualism is as bilingual does: Metalinguistic abilities of Arabic-speaking children. Applied Psycholinguistics, 21, 451–471.

    Article  Google Scholar 

  • Galambos, S. J., & Hakuta, K. (1988). Subject-specific and task-specific characteristics of metalinguistic awareness in bilingual children. Applied Psycholinguistics, 9, 141–162.

    Article  Google Scholar 

  • Genesee, F. (2006). Bilingual first language acquisition in perspective. In P. McCardle & E. Hoff (Eds.), Childhood bilingualism: Research on infancy through school age (pp. 45–67). Multilingual Matters.

    Chapter  Google Scholar 

  • Geva, E., Wade-Woolley, L., & Shany, M. (1997). Development of reading efficiency in first and second language. Scientific Studies of Reading, 1, 119–144.

    Article  Google Scholar 

  • Guo, T., Mishra, M., Tam, J. W., & Kroll, J. F. (2012). On the time course of accessing meaning in a second language: An electrophysiological investigation of translation recognition. Journal of Experimental Psychology: Learning, Memory and Cognition, 38, 1165–1186.

    Google Scholar 

  • Heugh, K., & Skutnabb-Kangas, T. (Eds.) (2010). Multilingual education works: From the periphery to the centre. Orient Blackswan.

    Google Scholar 

  • Heugh, K., Benson, C., Yohannes, M. A. G., & Bogale, B. (2010). Multilingual education in Ethiopia: What assessment shows about what works and what doesn't. In K. Heugh, & T. Skutnabb-Kangas (Eds.), Multilingual education works: From the periphery to the centre (pp. 287–315). New Delhi: Orient Blackswan.

    Google Scholar 

  • Ho, C. S., & Bryant, P. (1997). Learning to read Chinese beyond the logographic phase. Reading Research Quarterly, 32, 276–289.

    Article  Google Scholar 

  • Ianco-Worral, A. (1972). Bilingualism and cognitive development. Child Development, 43, 1390–1400.

    Article  Google Scholar 

  • Ijalba, E., Obler, L. E., & Chengappa, S. (2013) Bilingual aphasia: Theoretical and clinical considerations. In T. K. Bhatia, & W. C. Ritchie (Eds.), The handbook of bilingualism and multilingualism (2nd ed., pp. 61–82). Wiley-Blackwell.

    Google Scholar 

  • Kar, B. R., Rimzhim, A., Chatterjee, S., & Maral, P. (2014) Biliteracy and reading acquisition in Hindi and English among normally progressing readers and slow progressing readers. In R. Sagar, R. D. Pattanayak, M. Mehta, & H. B. Singh (Eds.), Specific learning disorder: Indian scenario (pp. 102–117). AIIMS.

    Google Scholar 

  • Khare, V., Verma, A., Kar, B., Srinivasan, N., & Brysbaert, M. (2013). Bilingualism and the increased attentional blink effect: Evidence that the difference between bilinguals and monolinguals generalises to different levels of second language proficiency. Psychological Research, 77, 728–737.

    Article  PubMed  Google Scholar 

  • Kharkhurin, A. V. (2012). Multilingualism and creativity. Multilingual Matters.

    Book  Google Scholar 

  • Kroll, J. F., Dussias, P. E., Bogulski, C. A., & Valdes-Kroff, J. (2012). Juggling two languages in one mind: what bilinguals tell us about language processing and its consequences for cognition. In B. Ross (Ed.), The psychology of learning and motivation (Vol. 56, pp. 229–269). Academic Press.

    Google Scholar 

  • Kumar, U., Das, T., Bali, R. S., Padakannaya, P., Joshi, M. R., & Singh, N. (2009). Neural representation of an alphasyllabary script—the Devanagari story. Current Science, 97, 1033–1038.

    Google Scholar 

  • Lambert, W. E. (1977). The effect of bilingualism on the individual: Cognitive and sociocultural consequences. In P. A. Hornby (Ed.), Bilingualism: Psychological, social and educational implications (pp. 15–27). Academic Press.

    Google Scholar 

  • Leopold, W. (1939–49). Speech development of a bilingual child (4 Vols.). North Western University Press.

    Google Scholar 

  • Liow, S. J. R., & Poon, K. K. L. (1998). Phonological awareness in multilingual Chinese children. Applied Linguistics, 19, 339–362.

    Google Scholar 

  • Mishra, R. K., Hilchey, M. D., Singh, N., & Klien, R. M. (2012). On the time course of exogenous cueing effects in bilinguals: Higher proficiency in a second language is associated with more rapid endogenous disengagement. Quarterly Journal of Experimental Psychology, 65, 1502–1510.

    Article  Google Scholar 

  • Mohanty, A. K. (1994). Bilingualism in a multilingual society. Central Institute of Indian Languages.

    Google Scholar 

  • Mohanty, A. K., & Perregaux, C. (1997). Language acquisition and bilingualism. In J. W. Berry, P. R. Dasen, & T. S. Saraswathi (Eds.), Handbook of cross-cultural psychology (2nd ed.), Vol. 2: Basic Processes and Human Development (pp. 217–253). Allyn and Bacon.

    Google Scholar 

  • Mohanty, A. K., Panda, S., & Mishra, B. (1999) Language socialization in a multilingual society (pp. 125–144). In T. S. Saraswathi (Ed.) Culture, socialization and human development. Sage.

    Google Scholar 

  • Mohanty, A. K. (2000). Perpetuating inequality: The disadvantage of language, minority mother tongues and related issues. In A. K. Mohanty, & G. Misra (Eds.), Psychology of poverty and disadvantage (pp. 104–117). Concept.

    Google Scholar 

  • Mohanty, A. K. (2006). Multilingualism of the unequals and predicaments of education in India: Mother tongue or other tongue? In O. Garcia, T. Skutnabb-Kangas, & M. Torres Guzman (Eds.), Imagining multilingual schools: Language in education and glocalisation (pp. 262–283). Multilingual Matters.

    Google Scholar 

  • Mohanty, A. K., Panda, M., Phillipson, R., & Skutnabb-Kangas, T. (Eds.) (2009). Multilingual education for social justice: Globalising the local. Orient BlackSwan.

    Google Scholar 

  • Mohanty, A. K., Acharya, B. M., Dash, U. N., Kundu, M. N., Mishra, M. K., Mohanty, M. M., Panda, M., & Pradhan, A. (2014). MLE policy and implementation guidelines for Odisha. Odisha Primary Education Programme Authority.

    Google Scholar 

  • Mohanty, A. K. (2017). Multilingualism, education, English and development: Whose development? In H. Coleman (Ed.), Multilingualism and development (pp. 261–280). British Council.

    Google Scholar 

  • Mohanty, A. K. (1989). Psychological consequences of mother tongue maintenance and the language of literacy for linguistic minorities in India. Psychology and Developing Societies, 2(1), 31–51.

    Article  Google Scholar 

  • Mohanty, A. K. (2009). Perpetuating inequality: Language disadvantage and capability deprivation of Tribal mother tongue speakers in India. In W. Harbert (Ed.), Language and poverty (pp. 102–124). Multilingual Matters.

    Google Scholar 

  • Mohanty, A. K. (2009). Multilingual education: A bridge too far? In T. Skutnabb-Kangas, R. Phillipson, A. K. Mohanty, & M. Panda (Eds.), Social justice through multilingual education (pp. 3–15). Multilingual Matters.

    Chapter  Google Scholar 

  • Mohanty, A. (2010a). Languages, inequality and marginalization: Implications of the double divide in Indian multilingualism. International Journal of the Sociology of Language, 205, 131–154.

    Google Scholar 

  • Mohanty, A. K. (2010b). Language disadvantage and capability deprivation of tribal mother tongue speakers. In F. Apffel-Marglin, S. Kumar, & A. Mishra (Eds.), Interrogating development: Insights from the margins (pp. 262–286). Oxford University Press.

    Google Scholar 

  • Mohanty, A. K. (2019). The multilingual reality: Living with languages. Multilingual Matters.

    Google Scholar 

  • Mohanty, A. K., & Skutnabb-Kangas, T. (2013). MLE as an economic equaliser in India and Nepal: Mother tongue based multilingual education fights poverty through capability development and identity support. In K. Henrard (Ed.), The interrelation between the right to identity of minorities and their socio-economic participation (pp. 159–187). Martinus Nijhoff.

    Google Scholar 

  • Mohanty, A. K., & Skutnabb-Kangas, T. (In press) Growing up in societies where multilingualism is the norm—or not: Educational promotion of monolingualism through violation of linguistic human rights. In A. Stavans and U. Jessner (eds.), The Cambridge handbook of childhood multilingualism. Cambridge University Press.

    Google Scholar 

  • Muter, V., & Diethelm, K. (2001). The contribution of phonological skill and letter knowledge to early reading development in a multilingual population. Language Learning, 51, 187–219.

    Article  Google Scholar 

  • NCERT (2011) Programme evaluation report: Multilingual education, Orissa. National Council of Educational Research and Training.

    Google Scholar 

  • Padakannaya, P., Rekha, D., Nigam, R., & Karanth, P. (1993) Phonological awareness, orthography and literacy. In R. J. Scholes (Ed.), Literacy: Linguistic and cognitive perspectives (pp. 55–70). Erlbaum Associates.

    Google Scholar 

  • Padakannaya, P. (1999). Reading disability and knowledge of orthographic principles. Psychological Studies, 44, 59–64.

    Google Scholar 

  • Padakannaya, P., & Mohanty, A. K. (2004). Indian orthography and teaching how to read. Psychological Studies, 49(4), 262–271.

    Google Scholar 

  • Panda, M., Mohanty, A. K., Nag, S., & Biswabandan, B. (2011). Does MLE work in Andhra Pradesh and Odisha? A Longitudinal Study. Swara, 1(6–7), 2–23.

    Google Scholar 

  • Peal, E., & Lambert, W. E. (1962). The relationship of bilingualism to intelligence. Psychological Monographs, 76, 1–23.

    Article  Google Scholar 

  • Ramirez, J. D., Sandra, D. Y., Dena, R. R. (1991). Executive summary: Final Report: Longitudinal study of structured English immersion strategy, early-exit and late-exit transitional bilingual education programs for language-minority children, Submitted to the U. S. Department of Education. San Mateo, CA: Aguirre International.

    Google Scholar 

  • Salvatierra, J. L., & Rosselli, M. (2011). The effect of bilingualism and age on inhibitory control. International Journal of Bilingualism, 15, 126–137.

    Google Scholar 

  • Serratrice, L. (2013). The bilingual child. In T. K. Bhatia & W. C. Ritchie (Eds.), The handbook of bilingualism and multilingualism (2nd ed., pp. 87–108). Wiley-Blackwell.

    Google Scholar 

  • Singh, N., & Mishra, R. K. (2012). Does language proficiency modulate oculomotor control? Evidence from Hindi-English bilinguals. Bilingualism: Language and Cognition, 15, 771–781.

    Google Scholar 

  • Singh, N., & Mishra, R. K. (2013). Second language proficiency modulates conflict monitoring in an oculomotor Troop task: Evidence from Hindi-English bilinguals. Frontiers in Psychology, 4, 1–10.

    Google Scholar 

  • Singh, N. C., Cherodath, S., Sumathi, T. A., Kosera, R., Currawala, K., Kar, B., & Oberoi, G. (2016). Reading skill in children provided simultaneous instruction in two distinct writing systems—insights from behaviour and neuroimaging. In L. Peer & G. Reid (Eds.), Multilingualism, literacy and Dyslexia—breaking down barriers for educators (pp. 200–214). Routledge.

    Chapter  Google Scholar 

  • Skutnabb-Kangas, T. (1995). Book review of Bilingualism in a multilingual society: Psycho-social and pedagogical implications, Ajit K. Mohanty. TESOL Quarterly, 29(4), 775–780.

    Google Scholar 

  • Skutnabb-Kangas, T. (2007). Bilingualism or not: The education of minorities (with an Introduction by Ajit Mohanty). Orient Longman.

    Google Scholar 

  • Skutnabb-Kangas, T. (2019). Series Editor’s Preface. In A. K. Mohanty (Ed.), The Multilingual Reality: Living with Languages. Bristol: Multilingual Matters, xiii–xv.

    Google Scholar 

  • Skutnabb-Kangas, T., & Mohanty, A. (2009) Policy and Strategy for MLE in Nepal. Multilingual Education Program for All Non-Nepali Speaking Students of Primary Schools of Nepal. Ministry of Education, Department of Education, Inclusive Section.

    Google Scholar 

  • Skutnabb-Kangas, T. (1984). Bilingualism or not: The education of minorities. Multilingual Matters.

    Google Scholar 

  • Skutnabb-Kangas, T. (2000). Linguistic genocide in education—or worldwide diversity and human rights? Lawrence Erlbaum.

    Google Scholar 

  • Snow, C. E., Cancino, H., Gonzalez, P., & Shriberg, P. (1989). Giving formal definitions: An oral language correlate of school literacy. In D. Bloome (Ed.), Classrooms and literacy (pp. 233–149). Ablex.

    Google Scholar 

  • Southworth, F. C. (1980). Functional aspects of bilingualism. International Journal of Dravidian Linguistics, IX, 1, 74–108.

    Google Scholar 

  • Sproat, R., & Padakannaya, P. (2008). Script indices. In N. Srinivasan, A. K. Gupta, & J. Pandey (Eds.), Advances in cognitive science (pp. 62–70). Sage.

    Google Scholar 

  • Sunderman, G., & Priya, K. (2012). Translation recognition in highly proficient Hindi-English bilinguals: The influence of different scripts but connectable phonologies. Language and Cognitive Processes, 27, 1265–1285.

    Article  Google Scholar 

  • Thomas, W. P., & Collier, V. P. (2002). A national study of school effectiveness for language minority students’ long-term academic achievement. George Mason University.

    Google Scholar 

  • Tunmer, W. E., & Myhill, M. E. (1984). Metalinguistic awareness and bilingualism. In W. E. Tunmer, C. Pratt, & M. L. Herriman (Eds.), Metalinguistic awareness in children (pp. 169–187). Springer.

    Chapter  Google Scholar 

  • UNESCO. (2009). Atlas of World’s languages in danger. UNESCO. http://www.unesco.org/culture/en/endangeredlanguages. Accessed March 17, 2009.

  • Vihman, M. M. (1985). Language differentiation by the bilingual infant. Journal of Child Language, 12, 297–324.

    Article  PubMed  Google Scholar 

  • Vygotsky, L. S. (1962). Thought and language. MIT Press.

    Book  Google Scholar 

  • Wu, H. S., De Temple, J. M., Herman, J., & Snow, C. E. (1994). L’animal qui fait oink! oink!: Bilingual children’s oral and written picture descriptions in English and French under varying conditions. Discourse Processes, 18, 141–164.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 2022 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

About this chapter

Check for updates. Verify currency and authenticity via CrossMark

Cite this chapter

Mohanty, A.K. (2022). Multilingualism as a Resource: Implications for Education. In: Tripathi, R., Kar, B.R., Pande, N. (eds) Towards an Integrative Psychological Science. Springer, Singapore. https://doi.org/10.1007/978-981-16-9565-0_9

Download citation

Publish with us

Policies and ethics