%0 Journal Article %A R. M. Sharipova %T Properties of a certain class of degenerate elliptic systems of second order equations %J Differencialʹnye uravneniâ %D 1973 %P 2280-2283 %V 9 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1973_9_12_a28/ %G ru %F DE_1973_9_12_a28