Kamaludin, Khairun Najmi, et al. “TRIPLE NONLINEAR HYPERBOLIC PID WITH STATIC FRICTION COMPENSATION FOR PRECISE POSITIONING OF A SERVO PNEUMATIC ACTUATOR”. IIUM Engineering Journal, vol. 24, no. 2, July 2023, pp. 315-36, doi:10.31436/iiumej.v24i2.2766.