%0 Journal Article
%T Joint sessions of the Petrovskii Seminar on differential equations and mathematical problems of physics and of the Moscow Mathematical Society (eleventh session, 18--21~January~1988)
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1988
%V 43
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1988_43_4_a33/
%G ru
%F RM_1988_43_4_a33