%0 Journal Article
%A M. G. Abrahamian
%A V. I. Petviashvili
%A A. M. Fridman
%T The nonlinear perturbations of gravitating disk and spiral structure of galaxies
%J Proceedings of the Yerevan State University. Physical and mathematical sciences
%D 1988
%P 70-77
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/UZERU_1988_3_a8/
%G ru
%F UZERU_1988_3_a8