@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/}
}