%0 Journal Article
%A Yu. G. Borisovich
%T An application of the concept of rotation of a vector field
%J Doklady Akademii Nauk
%D 1963
%P 12-15
%V 153
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1963_153_1_a1/
%G ru
%F DAN_1963_153_1_a1