“Research on the rigidity of a three-pulley, two-universe (PUU) parallel kinematic machine”, Int. J. Mech. Eng. Res. Tech., vol. 11, no. 1, pp. 10–19, Mar. 2019, Accessed: Oct. 13, 2026. [Online]. Available: https://ijmert.com/index.php/ijmert/article/view/64