%0 Journal Article
%A V. V. Lychagin
%T Contact geometry and non-linear second-order differential equations
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1979
%P 149-180
%V 34
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1979_34_1_a3/
%G en
%F RM_1979_34_1_a3