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@article{DE_1991_27_4_a24, author = {A. A. Stakun}, title = {Spectral properties of a singular differential operator}, journal = {Differencialʹnye uravneni\^a}, pages = {713--716}, publisher = {mathdoc}, volume = {27}, number = {4}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1991_27_4_a24/} }
A. A. Stakun. Spectral properties of a singular differential operator. Differencialʹnye uravneniâ, Tome 27 (1991) no. 4, pp. 713-716. http://geodesic.mathdoc.fr/item/DE_1991_27_4_a24/