الرفاعي ع. ا. ., and نتيفة ه. . “Using Weibull Distribution In Estimating Survival Probability For Syrian Population For Period (1998-2017)”. Tishreen University Journal- Economic and Legal Sciences Series, vol. 44, no. 2, May 2022, pp. 211-28, https://journal.tishreen.edu.sy/index.php/econlaw/article/view/12452.