El-Borai, Mahmoud, and Khairia El-Nadi. “Fractional Integrated Semi Groups and Nonlocal Cauchy Problem for Abstract Nonlinear Fractional Differential Equations”. Journal of Progressive Research in Mathematics 5, no. 3 (September 22, 2015): 553-560. Accessed May 18, 2024. http://scitecresearch.com/journals/index.php/jprm/article/view/408.