%0 Journal Article %A V. S. Vinogradov %T On certain boundary value problems for quasilinear elliptical systems of first order in the plane %J Doklady Akademii Nauk %D 1958 %P 579-581 %V 121 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1958_121_4_a1/ %G ru %F DAN_1958_121_4_a1