%0 Journal Article
%A Polidoro, S.
%A  Ragusa, M. A. 
%T Harnack inequality for hypoelliptic ultraparabolic equations with a singular lower order term.
%J Revista matemática iberoamericana
%D 2008
%P 1011-1046
%V 24
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RMI_2008_2008_1_a38/
%G en
%F RMI_2008_2008_1_a38