%0 Journal Article
%A A. A. Agrachev
%A A. V. Sarychev
%T Filtrations of a Lie algebra of vector fields and the nilpotent
%J Doklady Akademii Nauk
%D 1987
%P 777-781
%V 295
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1987_295_4_a0/
%G ru
%F DAN_1987_295_4_a0