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@article{DE_1965_1_7_a11, author = {Yu. K. Lando}, title = {On eigenvalues and eigenfunctions of integro-differential operators}, journal = {Differencialʹnye uravneni\^a}, pages = {977--989}, publisher = {mathdoc}, volume = {1}, number = {7}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1965_1_7_a11/} }
Yu. K. Lando. On eigenvalues and eigenfunctions of integro-differential operators. Differencialʹnye uravneniâ, Tome 1 (1965) no. 7, pp. 977-989. http://geodesic.mathdoc.fr/item/DE_1965_1_7_a11/