Maheswari, M.L. et al. 2023. Multipoint boundary value problem for a coupled system of psi-Hilfer nonlinear implicit fractional differential equation. Nonlinear Analysis: Modelling and Control. 28, 6 (Oct. 2023), 1138–1160. DOI:https://doi.org/10.15388/namc.2023.28.33474.