Derdar N, Alshammari M, Alshammari S, Abdo MS. Existence and Stability of Nonlinear Langevin FDEs with Mixed <i>ψ</i>-Hilfer and <i>ψ</i>-Caputo Derivatives Under Nonlocal Boundary Conditions. Contemp. Math. [Internet]. 2026 Jan. 27 [cited 2026 Feb. 8];7(1):742-73. Available from: https://ojs.wiserpub.com/index.php/CM/article/view/8724