%0 Journal Article %A M. A. Leysin %T On imbedding theorems for a certain class of singular differential operators in a half-space %J Differencialʹnye uravneniâ %D 1976 %P 1073-1083 %V 12 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1976_12_6_a13/ %G ru %F DE_1976_12_6_a13