“Mittag-Leffler-Ulam-Hyers-stability results for Chi-Hilferfractional derivative integro-differential equations” (2026) Nonlinear Studies, 33(2), pp. 625–633. Available at: https://nonlinearstudies.com/index.php/nonlinear/article/view/4093 (Accessed: 30 May 2026).