%0 Journal Article
%A V. S. Mokeichev
%T Eigenvalues of boundary value problems. Transformations of boundary value problems to boundary value problems with small coefficients
%J Differencialʹnye uravneniâ
%D 1989
%P 222-228
%V 25
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1989_25_2_a6/
%G ru
%F DE_1989_25_2_a6