%0 Journal Article %A V. I. Paškovskii %T Connected operators and boundary value problems for equations of elliptic type %J Differencialʹnye uravneniâ %D 1976 %P 118-128 %V 12 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1976_12_1_a14/ %G ru %F DE_1976_12_1_a14