%0 Journal Article
%A F. Bigolin
%A A. Kozhevnikov
%T Tangency, Paratangency and Four-Cones Coincidence Theorem in Carnot Groups
%J Journal of convex analysis
%D 2014
%P 887-899
%V 21
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JCA_2014_21_3_JCA_2014_21_3_a16/
%F JCA_2014_21_3_JCA_2014_21_3_a16