“Optimal Proportional Integral Derivative Controller for Two-Wheeled Self- Balanced Mobile Robots Based on Particle Swarm Algorithm”. University of Thi-Qar Journal for Engineering Sciences 12, no. 2 (December 1, 2022): 63–69. Accessed July 3, 2024. https://jeng.utq.edu.iq/index.php/main/article/view/492.