Maheswari ML, Shri KSK, Elsayed EM. Multipoint boundary value problem for a coupled system of psi-Hilfer nonlinear implicit fractional differential equation. NAMC [Internet]. 2023 Oct. 27 [cited 2026 Mar. 15];28(6):1138-60. Available from: https://www.zurnalai.vu.lt/nonlinear-analysis/article/view/33474