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@article{DAN_1957_117_6_a1, author = {G. M. Zhislin}, title = {On the existence of characteristic functions for {Schr\"odinger's} equation}, journal = {Doklady Akademii Nauk}, pages = {931--934}, publisher = {mathdoc}, volume = {117}, number = {6}, year = {1957}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1957_117_6_a1/} }
G. M. Zhislin. On the existence of characteristic functions for Schr\"odinger's equation. Doklady Akademii Nauk, Tome 117 (1957) no. 6, pp. 931-934. http://geodesic.mathdoc.fr/item/DAN_1957_117_6_a1/