Rabbi, Ahbab Mohammad Fazle. “Lower and Upper Bounds of Life Expectancies and Total Expected Longevity of a Developing Country”. South East Asia Journal of Public Health 3, no. 2 (August 17, 2014): 52–57. Accessed April 29, 2024. https://www.banglajol.info/index.php/SEAJPH/article/view/20041.