Ahmad, B., S. K. Ntouyas, J. Tariboon, and A. Alsaedi. “A Study of Nonlinear Fractional-Order Boundary Value Problem With Nonlocal Erdelyi-Kober and Generalized Riemann-Liouville Type Integral Boundary Conditions”. Mathematical Modelling and Analysis, vol. 22, no. 2, Mar. 2017, pp. 121-39, doi:10.3846/13926292.2017.1274920.