Noor Hatem, Yusri Yusof, Aini Zuhra A. Kadir, Mohammed M. A. “A Review of Tool Path Optimization in CNC Machines: Methods and Its Applications Based on Artificial Intelligence”. International Journal of Advanced Science and Technology, Vol. 29, no. 04, June 2020, pp. 3368 -, http://sersc.org/journals/index.php/IJAST/article/view/24422.