Al-Smadi, M., Z. Altawallbeh, A. M. Ateiwi, and I. V. Komashinskaya. “Numerical Solutions of Fractional system, two-Point BVPs Using Iterative Reproducing Kernel Algorithm”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 70, no. 5, May 2018, pp. 599-10, https://umj.imath.kiev.ua/index.php/umj/article/view/1580.