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@article{DE_1978_14_8_a12, author = {B. D. Kotlyar}, title = {Singular numbers of integral operators}, journal = {Differencialʹnye uravneni\^a}, pages = {1473--1477}, publisher = {mathdoc}, volume = {14}, number = {8}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1978_14_8_a12/} }
B. D. Kotlyar. Singular numbers of integral operators. Differencialʹnye uravneniâ, Tome 14 (1978) no. 8, pp. 1473-1477. http://geodesic.mathdoc.fr/item/DE_1978_14_8_a12/