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Translated fromMatematicheskie Zametki, Vol. 58, No. 3, pp. 468–471, September, 1995.
The work was financially supported by the Russian Foundation for Basic Research under grant No. 93-011-273.
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Mukimov, V.R., Sultanaev, Y.T. The deficiency indices of a symmetric third-order differential operator. Math Notes 58, 1002–1005 (1995). https://doi.org/10.1007/BF02304782
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DOI: https://doi.org/10.1007/BF02304782