%0 Journal Article
%A È. M. Saak
%T The Riemann problem for nonselfadjoint elliptic differential equations
%J Differencialʹnye uravneniâ
%D 1987
%P 1360-1366
%V 23
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1987_23_8_a8/
%G ru
%F DE_1987_23_8_a8