“Existence and Ulam-Hyers Stability Results to Fuzzy Fractional Boundary Value Problems via Hilfer Fractional Derivative” (2024) Nonlinear Studies, 31(3), pp. 759–777. Available at: https://www.nonlinearstudies.com/index.php/nonlinear/article/view/3378 (Accessed: 17 April 2026).