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Translated from Ukrainskii Matematicheskii Zhurnal, Vol.22, No. 4, pp. 527–531, July–August, 1970.
The author is grateful to Yu. M. Berezanskii for his interest in the paper.
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Barkovskii, V.V. Self-adjoint property of operators generated by a general elliptic expression and inhomogeneous boundary conditions prescribed on part of the boundary of a bounded region. Ukr Math J 22, 451–455 (1970). https://doi.org/10.1007/BF01090770
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DOI: https://doi.org/10.1007/BF01090770