%0 Journal Article
%A S. Yu. Pilyugin
%T Phase diagrams that determine Morse--Smale systems without periodic trajectories on spheres
%J Differencialʹnye uravneniâ
%D 1978
%P 245-254
%V 14
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1978_14_2_a5/
%G ru
%F DE_1978_14_2_a5