%0 Journal Article
%A A. S. Sumbatov
%T Nonextremality of families of curves defined by dynamic equations of nonholonomic Chaplygin systems
%J Differencialʹnye uravneniâ
%D 1984
%P 897-899
%V 20
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1984_20_5_a25/
%G ru
%F DE_1984_20_5_a25