Liu, Yanpei. "6. Ordinary differential equations". Combinatorial Functional Equations: Basic Theory, Berlin, Boston: De Gruyter, 2019, pp. 137-168. https://doi.org/10.1515/9783110625837-006
Liu, Y. (2019). 6. Ordinary differential equations. In Combinatorial Functional Equations: Basic Theory (pp. 137-168). Berlin, Boston: De Gruyter. https://doi.org/10.1515/9783110625837-006
Liu, Y. 2019. 6. Ordinary differential equations. Combinatorial Functional Equations: Basic Theory. Berlin, Boston: De Gruyter, pp. 137-168. https://doi.org/10.1515/9783110625837-006
Liu, Yanpei. "6. Ordinary differential equations" In Combinatorial Functional Equations: Basic Theory, 137-168. Berlin, Boston: De Gruyter, 2019. https://doi.org/10.1515/9783110625837-006
Liu Y. 6. Ordinary differential equations. In: Combinatorial Functional Equations: Basic Theory. Berlin, Boston: De Gruyter; 2019. p.137-168. https://doi.org/10.1515/9783110625837-006