1. Stewart, D.: A platform with six degrees of freedom. Proc. Inst. Mech. Eng. 180(15 pt 1), 371–386 (1965)
2. Merlet, J.-P.: Parallel Robots, Solid Mechanics and Its Applications. Kluwer, Norwell (2001)
3. Merlet, J.-P.: Still a long way to go on the road for parallel mechanisms. In: A Keynote Speech at ASME 2002 DETC Conference, Montreal, Quebec, Canada (2002)
4. Merlet, J.-P.: Parallel Robots, Open Problems. INRIA Sophia-Antipolis, France. http://www.-sop.inria.fr
5. Tsai, L.-W.: Robot Analysis, The Mechanics of Serial and Parallel Manipulators. Wiley, New York (1999)