Joelianto, Endra, and Parlindungan H. Sitanggang. 2013. “A Substractive Clustering Based Fuzzy Hybrid Reference Control Design for Transient Response Improvement of PID Controller”. Journal of Engineering and Technological Sciences 41 (2):167-86. https://doi.org/10.5614/itbj.eng.sci.2009.41.2.6.