Ngamsom, Pinit. “A Graphical Robust PID Controller Design for Time-Varying Uncertain Systems With Applications to Trajectory Tracking of a Load-Varying Rigid SCARA”. Science & Technology Asia 21, no. 2 (June 17, 2016): 34–44. Accessed May 3, 2024. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/59000.