@article{DE_1979_15_5_a8,
     author = {P. I. Achilov},
     title = {The uniqueness of expansions in eigenfunctions of the {Schr\"odinger} operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {846--857},
     publisher = {mathdoc},
     volume = {15},
     number = {5},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1979_15_5_a8/}
}