@article{IVM_1991_12_a15,
     author = {S. S. Lapushkin},
     title = {On a~problem for the {Schr\"odinger} equation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {85--86},
     publisher = {mathdoc},
     number = {12},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1991_12_a15/}
}