%0 Journal Article
%A V. F. Butuzov
%A A. B. Vasil'eva
%T Differential and difference systems of equations with a small parameter in the case when the unperturbed (degenerate) system is situated on the spectrum
%J Differencialʹnye uravneniâ
%D 1970
%P 650-664
%V 6
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1970_6_4_a7/
%G ru
%F DE_1970_6_4_a7