Salman, Abbas N., and Ibtehal H. Farhan. “Estimate Complete the Survival Function for Real Data of Lung Cancer Patients”. Ibn AL-Haitham Journal For Pure and Applied Sciences 27, no. 3 (April 13, 2017): 531–541. Accessed March 31, 2025. https://jih.uobaghdad.edu.iq/index.php/j/article/view/318.