%0 Journal Article
%A A. M. Il'in
%A E. F. Lelikova
%T A~method of joining asymptotic expansions for the equation $\varepsilon\Delta u-a(x,y)u_y=f(x,y)$ in a~rectangle
%J Sbornik. Mathematics
%D 1975
%P 533-548
%V 25
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1975_25_4_a4/
%G en
%F SM_1975_25_4_a4