%0 Journal Article
%A V. V. Laricheva
%T A generalization of perturbation theory for a nonlinear system that loses a small parameter in a subset of the range of the solution
%J Doklady Akademii Nauk
%D 1976
%P 533-536
%V 228
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1976_228_3_a3/
%G ru
%F DAN_1976_228_3_a3