Muhammad, Z., K. A. Jamil, Z. Mohd Yusoff, and M. H. F. Rahiman. “Application of Self-Tuning Fuzzy PID (STFPID) Controller on Industrial Essential Oil Extraction System Using System Identification Approach”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 10, no. 1-3, Jan. 2018, pp. 51-55, https://jtec.utem.edu.my/jtec/article/view/3486.