Ni, Yanbing, Wenliang Lu, Shilei Jia, Chenghao Lu, Ling Zhang, and Yang Wen. “Limit-Protection Method for Workspace of a Parallel Power Head”. Strojniški vestnik - Journal of Mechanical Engineering 68, no. 9 (September 15, 2022): 560–570. Accessed January 10, 2025. http://193.2.78.197/index.php/sv-jme/article/view/69.