%0 Journal Article
%A P. V. Elyutin
%T Perturbation theory and the quasi-classical approximation in an energetic representation
%J Doklady Akademii Nauk
%D 1987
%P 1089-1092
%V 294
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1987_294_5_a15/
%G ru
%F DAN_1987_294_5_a15