Hamoud, Ahmed A., et al. “Existence and Uniqueness of Solutions for the Neutral Fractional Integro-Differential Equations With Fractional Integral Boundary Conditions”. Journal of Vibration Testing and System Dynamics, vol. 6, no. 1, Mar. 2022, pp. 1-11, https://doi.org/10.5890/JVTSD.2022.03.001.