E. J. Talabani, Rawand. “Displacement Detection Application of HDNS A2051 Optical Sensor for Controlling a 4-DOF Cylindrical Manipulator”. Al-Rafidain Engineering Journal (AREJ) 17, no. 6 (December 28, 2009): 53–66. Accessed August 7, 2025. https://ojs.uomosul.edu.iq/index.php/arej/article/view/27005.