1. Feedback invariants for nonlinear systems;Brockett,1978
2. Feedback linearization of discrete-time systems;Grizzle,1986
3. Design for multi-input nonlinear systems;Hunt,1983
4. Orbites de pseudogroupes de difféomorphismes et commandabilité des systémes nonlineaires en temps discret;Jakubczyk;C. R. Acad. Sci. Paris,1984
5. On linearization of control systems;Jakubczyk;Bull. Acad. Pol. Sci. Ser. Math.,1980