%0 Journal Article
%A M. A. Krasnosel'skii
%A V. V. Strygin
%T Principles of rotational invariance of a~vector field
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1965
%V 20
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1965_20_4_a24/
%G ru
%F RM_1965_20_4_a24