Hashim, M. R., H. A. K., and M. O. Tokhi. “Optimal Tuning of PD Controllers Using Modified Artificial Bee Colony Algorithm”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 10, no. 2-8, July 2018, pp. 67-70, https://jtec.utem.edu.my/jtec/article/view/4461.