%0 Journal Article
%A K. V. Zadiraka
%T Investigation of singularly perturbed systems in the neighborhood of a family of closed orbits
%J Doklady Akademii Nauk
%D 1962
%P 264-267
%V 144
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1962_144_2_a3/
%G ru
%F DAN_1962_144_2_a3