%0 Journal Article %A V. S. Vinogradov %T On the boundedness of the solutions of boundary problems for first order linear elliptical systems in a plane %J Doklady Akademii Nauk %D 1958 %P 399-402 %V 121 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1958_121_3_a0/ %G ru %F DAN_1958_121_3_a0