@article{DE_1976_12_6_a13,
     author = {M. A. Leysin},
     title = {On imbedding theorems for a certain class of singular differential operators in a half-space},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1073--1083},
     publisher = {mathdoc},
     volume = {12},
     number = {6},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_6_a13/}
}