Mahdy, Amr, and G. M. A.Marai. “Fractional Power Series Method For Solving The Time-Fractional Biological Population Model Equation”. Journal of Progressive Research in Mathematics 11, no. 2 (February 23, 2017): 1554-1565. Accessed May 4, 2024. http://scitecresearch.com/journals/index.php/jprm/article/view/996.