Existence results for nonlinear fractional integro-differential equations with integral and antiperiodic boundary conditions. - Lahcen Ibnelazyz; Karim Guida; Khalid Hilal; Said Melliani (Comput. Appl. Math., 2021)

The existence, uniqueness and Ulam-Hyers stability results of a hybrid coupled system with Ψ-Caputo fractional derivatives. - Najat Chefnaj; Khalid Hilal; Ahmed Kajouni (J. Appl. Math. Comput., 2024)

Existence and uniqueness of solutions for Ψ-Caputo fractional neutral sequential differential equations on time scales. - Najat Chefnaj; Khalid Hilal; Ahmed Kajouni (J. Appl. Math. Comput., 2024)

Laplace transform method for a coupled system of (p, q)-Caputo fractional differential equations. - Asmaa Baihi; Ahmed Kajouni; Khalid Hilal; Hamid Lmou (J. Appl. Math. Comput., 2025)

On the Langevin fractional boundary value integro-differential equations involving ψ-Caputo derivative with two distinct variable-orders. - Samira Zerbib; Khalid Hilal; Ahmed Kajouni (Comput. Appl. Math., 2025)