Al-Shboul, B., H. Faris, and N. Ghatasheh. “Initializing Genetic Programming Using Fuzzy Clustering and Its Application in Churn Prediction in the Telecom Industry”. Malaysian Journal of Computer Science, vol. 28, no. 3, Sept. 2015, pp. 213-20, https://jpmm.um.edu.my/index.php/MJCS/article/view/6863.