%0 Journal Article
%A A. A. Agrachev
%A R. V. Gamkrelidze
%T Chronological algebras and nonstationary vector fields
%J Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara
%D 1980
%P 135-176
%V 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/INTG_1980_11_a3/
%G ru
%F INTG_1980_11_a3