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@article{DAN_1962_142_3_a12, author = {L. A. Sakhnovich}, title = {The discrete spectrum of the {Schr\"odinger} radial equation}, journal = {Doklady Akademii Nauk}, pages = {550--553}, publisher = {mathdoc}, volume = {142}, number = {3}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1962_142_3_a12/} }
L. A. Sakhnovich. The discrete spectrum of the Schr\"odinger radial equation. Doklady Akademii Nauk, Tome 142 (1962) no. 3, pp. 550-553. http://geodesic.mathdoc.fr/item/DAN_1962_142_3_a12/