1. The zero dynamic algorithm for general nonlinear systems and its application in exact output tracking;Byrnes,1991
2. On the singular tracking problem;Crouch;Math Control Signals Systems,1991
3. Necessary conditions for asymptotic tracking in nonlinear systems;Grizzle,1991
4. On the singular tracking for multivariable systems;Fayaz,1990
5. Global output tracking for nonlinear systems;Hirschorn;SIAM J. Control Optim.,1987