[1]
M. A. Almalahi, M. S. Abdo, and S. K. Panchal, “$\psi$-Hilfer Fractional Functional Differential Equation by Picard Operator Method”, JAND, vol. 9, no. 4, pp. 685–702, Aug. 2026, doi: 10.5890/JAND.2020.12.011.