@article{DE_1989_25_1_a8,
     author = {A. S. Makin},
     title = {Summability of spectral expansions that correspond to the nonselfadjoint {Schr\"odinger} operator. {I}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {65--73},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_1_a8/}
}