%0 Journal Article %A M. V. Borsuk %T A priori estimates and solvability of second-order quasilinear elliptic equations in a composite region with nonlinear boundary and conjugacy condition %J Doklady Akademii Nauk %D 1967 %P 991-994 %V 177 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_177_5_a0/ %G ru %F DAN_1967_177_5_a0