Ahmad, Nauman, and Amena Urooj. “Outlier and Time-Dependent Covariate in Survival Analysis, A Simulation Based Study”. iRASD Journal of Economics 5, no. 2 (June 30, 2023): 577–588. Accessed May 21, 2024. https://internationalrasd.org/journals/index.php/joe/article/view/1666.