Fathoni, M. Ivan Ariful, Gunardi, Fajar Adi-Kusumo, Susanna Hilda Hutajulu, and Ibnu Purwanto. “Cox Proportional Hazard Regression Interaction Model and Its Application to Determine The Risk of Death in Breast Cancer Patients After Chemotherapy”. International Journal of Statistics in Medical Research 11 (October 21, 2022): 105–113. Accessed May 3, 2024. https://lifescienceglobal.com/pms/index.php/ijsmr/article/view/8860.