Salah Aldean Qassim Haidari, Salwa, and Bashar Abd Al-Aziz Al-Talib. “Robustifying Cox - Regression Model Estimation Using M - Estimators With Application to Breast Cancer Patients”. IRAQI JOURNAL OF STATISTICAL SCIENCES 20, no. 2 (December 1, 2023): 166–174. Accessed September 10, 2025. https://edusj.uomosul.edu.iq/index.php/stats/article/view/29072.