%0 Journal Article %A S. N. Syukaev %T A priori estimates for solutions of quasi-linear differential equations of elliptic type %J Doklady Akademii Nauk %D 1973 %P 1306-1309 %V 211 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1973_211_6_a15/ %G ru %F DAN_1973_211_6_a15