%0 Journal Article
%A N. N. Blinov
%A R. S. Saks
%A S. L. Sobolev
%A V. A. Toponogov
%A S. V. Uspenskii
%T Soviet-Hungarian Symposium on Differential Equations, Theory of Approximation, and Topology
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1982
%V 37
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1982_37_4_a32/
%G ru
%F RM_1982_37_4_a32