1. J. El Omri, P. Wenger, How to recognize simply a non-singular posture changing 3-DOF manipulator, in: Proc. 7th Int. Conf. on Advanced Robotics, 1995, pp. 215–222.
2. Singularity-free evolution from one configuration to another in serial and fully-parallel manipulators;Innocenti;ASME J. Mech. Des.,1998
3. V. Parenti-Castelli, C. Innocenti, Position analysis of robot manipulators: Regions and subregions, in: Proceedings of 1988 Conference on Advances in Robot Kinematics, Ljubljana, 1988, pp. 151–158.
4. J.W. Burdick, On the Inverse Kinematics of Redundant Manipulators: Characterization of the Self-Motion Manifolds, in: 1989 International Conference on Advanced Robotics, Vol. 4, Ohio, 1989, p. 10.
5. A study of multiple manipulator inverse kinematic solutions with applications to trajectory planning and workspace determination;Borrel,1986