%0 Journal Article
%T Nonsmooth Hormander vector fields and their control balls
%A Annamaria Montanari
%A Daniele Morbidelli
%J Mathematics
%D 2008
%I arXiv
%R 10.1090/S0002-9947-2011-05395-X
%X We prove a ball-box theorem for nonsmooth Hormander vector fields of step s.
%U http://arxiv.org/abs/0812.2369v3