Shehata, Wahid, Murtadha Mansour Abdullah, and Mohamed K. A. Refaie. “A Novel Four-Parameter Log-Logistic Model: Mathematical Properties and Applications to Breaking Stress, Survival Times and Leukemia Data”. Pakistan Journal of Statistics and Operation Research 18, no. 1 (March 4, 2022): 133-149. Accessed August 31, 2025. https://pjsor.com/pjsor/article/view/3268.