F. Hamad, Salem Abdulkarim, and Ayman Hamad, “Mixture method to estimate baseline hazard for non-arbitrary function of the Cox proportional model”, IJSBAR, vol. 62, no. 2, pp. 235–248, May 2022, Accessed: Sep. 11, 2025. [Online]. Available: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/14023