Abdeljawad, Thabet, Iyad Suwan, Fahd Jarad, and Ammar Qarariyah. “More Properties of Fractional Proportional Differences”. Journal of Mathematical Analysis and Modeling 2, no. 1 (March 29, 2021): 72–90. Accessed September 21, 2025. https://sabapub.com/index.php/jmam/article/view/193.