Sadiq, A. T., H. S. . Abdullah, and Z. O. Ahmed. “Solving Flexible Job Shop Scheduling Problem Using Meerkat Clan Algorithm”. Iraqi Journal of Science, Vol. 59, no. 2A, Apr. 2018, pp. 754-61, https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/251.