“Investigation and Simulation the Kinematic Singularity of Three Links Robot Manipulator with Spherical Wrist”, JUBES, vol. 26, no. 8, pp. 77–87, Aug. 2018, Accessed: Jan. 27, 2026. [Online]. Available: https://mail.journalofbabylon.com/index.php/JUBES/article/view/1581