Saputra, J., and R. Nur Hasanah. “An FL-PID Mixed Technique to Control a Military Rocket Launcher System Board”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, no. 3-7, Nov. 2017, pp. 29-36, https://jtec.utem.edu.my/jtec/article/view/3061.