%0 Journal Article
%A V. F. Butuzov
%A N. N. Nefedov
%T A problem in the theory of singular perturbations
%J Differencialʹnye uravneniâ
%D 1976
%P 1736-1747
%V 12
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1976_12_10_a1/
%G ru
%F DE_1976_12_10_a1