%0 Journal Article
%A V. V. Kozlov
%T Topological obstructions to the integrability of natural mechanical systems
%J Doklady Akademii Nauk
%D 1979
%P 1299-1302
%V 249
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1979_249_6_a3/
%G ru
%F DAN_1979_249_6_a3