%0 Journal Article %A N. E. Tovmasyan %T On a~method of solving boundary value problems for elliptic systems of second-order differential equations in the plane %J Sbornik. Mathematics %D 1972 %P 603-620 %V 18 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1972_18_4_a4/ %G en %F SM_1972_18_4_a4