1. Controllability of nonlinear systems;Sussmann;J. Differential Equations,1972
2. M. Kawski, 2006. On the problem whether controllability is finitely determined, in: Proceedings of MTNS.
3. Multiplicity of a Noetherian Intersection, vol. 186;Gabrielov,1998
4. Multiplicities of Zeroes of Polynomials on Trajectories of Polynomial Vector Fields and Bounds on Degree of Nonholonomy, vol. 2;Gabrielov,1995
5. Nonholonomic systems: controllability and complexity;Laumond;Theoret. Comput. Sci.,1996