Selmani M, Harrat C, Bouizem Y. Existence, Uniqueness, and Stability of Solutions to the Langevin Equation via the $(k,\psi)$-Hilfer Proportional Fractional Operator with Multi-Point Fractional Boundary Conditions. DNC [Internet]. 2026 Aug. 17 [cited 2026 Aug. 17];15(4):491-507. Available from: https://lhscientificpublishing.com/index.php/DNC/article/view/2107