%0 Journal Article
%A I. P. Egorov
%A A. T. Kondrat'ev
%A N. S. Lipatov
%T Eleventh Scientific Conference of Mathematical Departments of Volga Zone
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1970
%V 25
%N 6
%U http://geodesic.mathdoc.fr/item/RM_1970_25_6_a17/
%G ru
%F RM_1970_25_6_a17