%0 Journal Article
%A B. M. Dubrov
%T On a class of contact invariants of systems of ordinary differential equations
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 2006
%P 76-77
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_2006_1_a10/
%G ru
%F IVM_2006_1_a10