%0 Journal Article
%T Joint sessions of the Petrovskii Seminar on differential equations and mathematical problems of physics and of the Moscow Mathematical Society (second meeting, 18--20~January~1979)
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1979
%V 34
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1979_34_4_a31/
%G ru
%F RM_1979_34_4_a31