A.A. Agrachev, J.-P. Gauthier, On subanalyticity of Carnot-Caratheodory distances

Title: On subanalyticity of Carnot---Caratheodory distances
Authors: A.A. Agrachev, J.-P. Gauthier
Journal title: Annales de l'Institut Henri Poincare`- Analyse non lineaire
Year: 2001
Volume: 18
Pages: 359-382