%0 Journal Article %A S. N. Antontsev %A V. N. Monakhov %T Riemann--Hilbert boundary value problem with discontinuous boundary conditions for quasi-linear elliptic systems of equations %J Doklady Akademii Nauk %D 1967 %P 511-513 %V 175 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_175_3_a0/ %G ru %F DAN_1967_175_3_a0