1. Physik instrumente (pi) gmbh & co. kg. 2015. Last visited on October 14th; http://www.physikinstrumente.com/products/parallel-kinematic-hexapods.html.
2. Pkmtricept sl. 2015. Last visited on October 15th; http://www.pkmtricept.com/.
3. Adept technology, inc.2015. Last visited on October 14th; http://www.adept.com/products/robots.
4. Moog inc. 2015. Last visited on October 15th; http://www.moog.com/products/hexapods-positioning-systems/.
5. Simulation in robotics;Žlajpah;Math Comput Simul,2008