1. Semianalytic and subanalytic sets;Bierstone;Publ. Math. IHÉS,1988
2. Gevrey vectors in involutive tube structures and Gevrey regularity for the solutions of certain classes of semilinear systems;Castellanos;J. Anal. Math.,2013
3. Subelliptic estimates for some systems of complex vector fields. Hyperbolic problems and related questions - trends in mathematics;Derridj;Birkhauser,2006
4. J.-L. Journé, J.-M. Trépreau, Hypoellipticité sans sous-ellipticité: le cas des systèmes de n champs de vecteurs complexes en (n+1) variables. Séminaire É.D.P. (2005-2006), Exposé no. XIV, 17p.