%0 Journal Article
%A A. I. Perov
%T Topological characteristics of solutions of higher-dimensional differential equations
%J Doklady Akademii Nauk
%D 1964
%P 791-794
%V 157
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1964_157_4_a9/
%G ru
%F DAN_1964_157_4_a9