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@article{DE_1968_4_9_a13, author = {Yu. N. Sudarev}, title = {The distribution of eigenvalues of a singular opeator}, journal = {Differencialʹnye uravneni\^a}, pages = {1676--1682}, publisher = {mathdoc}, volume = {4}, number = {9}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1968_4_9_a13/} }
Yu. N. Sudarev. The distribution of eigenvalues of a singular opeator. Differencialʹnye uravneniâ, Tome 4 (1968) no. 9, pp. 1676-1682. http://geodesic.mathdoc.fr/item/DE_1968_4_9_a13/