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Translated from Matematicheskie Zametki, Vol. 31, No. 1, pp. 41–51, January, 1982.
The author thanks F. G. Maksudov and S. Ya. Yakubov for valuable discussion and advice.
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Mamedov, K.S. Asymptotic behavior of distribution function of eigenvalues of abstract differential operator. Mathematical Notes of the Academy of Sciences of the USSR 31, 23–29 (1982). https://doi.org/10.1007/BF01146263
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DOI: https://doi.org/10.1007/BF01146263