%0 Journal Article
%A I. I. Danilyuk
%A L. V. Ovsyannikov
%T Soviet-American Symposium on Partial Differential Equations
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1964
%V 19
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1964_19_2_a23/
%G ru
%F RM_1964_19_2_a23