Khader, E. I., W. W. Ismail, N. M. Mhaidat, and M. A. Alqudah. “Effect of Metformin on Irinotecan-Induced Cell Cycle Arrest in Colorectal Cancer Cell Lines HCT116 and SW480”. International Journal of Health Sciences, vol. 15, no. 5, Aug. 2021, pp. 34-41, https://pub.qu.edu.sa/index.php/journal/article/view/5901.