%0 Journal Article
%A V. E. Nomofilov
%T Asymptotic solutions of the second order system of differential equations concentrated in a~vicinity of a~ray
%J Zapiski Nauchnykh Seminarov POMI
%D 1981
%P 170-179
%V 104
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1981_104_a16/
%G ru
%F ZNSL_1981_104_a16