“DB - Optimal Criterion Design to Estimate the Parameters of Some Proportional Hazards Model With Minimal Variance With Practical Application”. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ) 50, no. 3 (January 21, 2022): 87–94. Accessed November 19, 2024. https://alhadhar.com/raf-journal/index.php/JAUCS/article/view/503.