%0 Journal Article %A V. N. Aref'ev %T Elliptic problems with discontinuous coefficients in the boundary operators %J Differencialʹnye uravneniâ %D 1985 %P 1940-1947 %V 21 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1985_21_11_a11/ %G ru %F DE_1985_21_11_a11