Audomsi, S., P. Sawatphol, T. Prakhongwong, S. Ukumphan, W. Sa-Ngiamvibool, and B. Wattana. “The Design Process of a 2-DOF PID Controller Applying the Salp Swarm Algorithm for Position Control of a Linear DC Motor”. Indochina Applied Sciences, vol. 15, no. 2, Aug. 2026, p. 269161, doi:10.55674/ias.v15i2.269161.