Ahmed, M., and H. Elkhlout. “Approximate Solutions for Cauchy-Euler Differential Equations With Riemann-Liouville’s Fractional Derivatives via Runge-Kutta Techniques”. Journal of Humanitarian and Applied Sciences, vol. 8, no. 16, Dec. 2023, pp. 294-03, https://khsj.elmergib.edu.ly/index.php/jhas/article/view/455.