%0 Journal Article
%A V. A. Ginzburg
%T The method of orbits and perturbation theory
%J Doklady Akademii Nauk
%D 1979
%P 525-528
%V 249
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1979_249_3_a1/
%G ru
%F DAN_1979_249_3_a1