[1]
Almalahi, M.A. et al. 2020. $\psi$-Hilfer Fractional Functional Differential Equation by Picard Operator Method. Journal of Applied Nonlinear Dynamics. 9, 4 (Dec. 2020), 685–702. DOI:https://doi.org/10.5890/JAND.2020.12.011.