@article{DE_1991_27_8_a21,
     author = {L. V. Kritskov},
     title = {The unconditional basis property for systems of root functions of the one-dimensional singular {Schr\"odinger} operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1446--1447},
     publisher = {mathdoc},
     volume = {27},
     number = {8},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_8_a21/}
}