@article{DE_1977_13_4_a24,
     author = {V. A. Lebedev},
     title = {Certain properties of an elliptic problem of {Sobolev}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {758--760},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_4_a24/}
}