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@article{DE_1965_1_8_a5, author = {D. F. Kharazov}, title = {The estimates of eigenvalues of certain operators with a discrete spectrum}, journal = {Differencialʹnye uravneni\^a}, pages = {1054--1069}, publisher = {mathdoc}, volume = {1}, number = {8}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1965_1_8_a5/} }
D. F. Kharazov. The estimates of eigenvalues of certain operators with a discrete spectrum. Differencialʹnye uravneniâ, Tome 1 (1965) no. 8, pp. 1054-1069. http://geodesic.mathdoc.fr/item/DE_1965_1_8_a5/