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@article{DE_1979_15_7_a4, author = {V. A. Sadovnichy and V. V. Dubrovskii}, title = {Some properties of operators with a discrete spectrum}, journal = {Differencialʹnye uravneni\^a}, pages = {1206--1211}, publisher = {mathdoc}, volume = {15}, number = {7}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1979_15_7_a4/} }
V. A. Sadovnichy; V. V. Dubrovskii. Some properties of operators with a discrete spectrum. Differencialʹnye uravneniâ, Tome 15 (1979) no. 7, pp. 1206-1211. http://geodesic.mathdoc.fr/item/DE_1979_15_7_a4/