%0 Journal Article
%A I. M. Petrushko
%T The Fredholmicity of certain boundary value problems for the equation $u_{xx}+yu_{yy}+\alpha(x,y)u_y+\beta(x,y)u_x+\gamma(x,y)u=f(x,y)$ in a mixed domain
%J Differencialʹnye uravneniâ
%D 1968
%P 123-135
%V 4
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_1_a10/
%G ru
%F DE_1968_4_1_a10