%0 Journal Article
%A V. M. Filippov
%T Variational principles for hypoelliptic equations
%J Doklady Akademii Nauk
%D 1985
%P 302-305
%V 285
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1985_285_2_a9/
%G ru
%F DAN_1985_285_2_a9