Hassan, Muhannad Karim, and Haifa Taha Abed. “Comparison of Survival Models to Study Determinants Liver Cancer”. Journal of Economics and Administrative Sciences 27, no. 125 (January 1, 2021): 509–528. Accessed May 1, 2025. https://www.jeasiq.uobaghdad.edu.iq/index.php/JEASIQ/article/view/2090.