1. Singularities of Differentiable Maps;Arnold,1985
2. On the inverse kinematics of redundant manipulators: characterization of the self-motion manifolds;Burdick,1989
3. On the singular tracking problem;Crouch;Math. Control Signals Systems,1991
4. Tracking control of a flexible robot link;Davis;IEEE Trans. Automat. Control,1988
5. Stable Mappings and Their Singularities;Golubitsky,1973