On the solvability and Ulam-Hyers stability for coupled fractional differential equations with impulsive effects. Gulf Journal of Mathematics, [S. l.], v. 23, n. 1, 2026. DOI: 10.56947/hpfzkb40. Disponível em: https://gjom.org/index.php/gjom/article/view/4464. Acesso em: 23 aug. 2026.