%0 Journal Article
%A E. S. Gubanova
%T Some questions of the theory of second-order elliptic equations on the plane
%J Differencialʹnye uravneniâ
%D 1983
%P 618-621
%V 19
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1983_19_4_a9/
%G ru
%F DE_1983_19_4_a9