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Original Russian Text © Y. T. Sultanaev, O. V. Myakinova, 2009, published in Matematicheskie Zametki, 2009, Vol. 86, No. 6, pp. 950–953.
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Sultanaev, Y.T., Myakinova, O.V. On the deficiency indices of a singular differential operator of fourth order in the space of vector functions. Math Notes 86, 895–898 (2009). https://doi.org/10.1134/S0001434609110340
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DOI: https://doi.org/10.1134/S0001434609110340