On the self-adjointness and on the nature of the spectrum of certain classes of abstract differential operators
English version (Springer): Ukrainian Mathematical Journal 25 (1973), no. 6, pp 673-676.
Citation Example: Kochubei A. N. On the self-adjointness and on the nature of the spectrum of certain classes of abstract differential operators // Ukr. Mat. Zh. - 1973. - 25, № 6. - pp. 811—815.
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