2) R. Zapata, P. Dauchez, and P. Coiffet : Cooperation of Robots in Gripping Tasks : The Exchange Problem, Robotica, Vol.1, No.2, pp. 73-77, 1983.
3) R. Zapata : Le Probléme de 1'Evitement des Collisions dans la Commande des Robots Manipulateurs, Thèse de 3 ème cycle, USTL, Montpellier, France, June 1983.
5) M. Kohno, A. Miyakawa, and M. Hosoya : Real Time Synchronization of Two Robots for Coordinated Assembly, Proc. 16 th Int. Symp. Industrial Robots, Brussels, pp. 219-228, September 1986.