TY - JOUR AU - Choukri Derbazi AU - Zidane Baitiche AU - Mouffak Benchohra AU - Gaston N AU - Guérékata TI - Existence, uniqueness, approximation of solutions and $\mathbb E_{\alpha}$--Ulam stability results for a class of nonlinear fractional differential equations involving $\psi$--Caputo derivative with initial conditions JO - Mathematica Moravica PY - 2021 SP - 1 EP - 30 VL - 25 IS - 1 PB - mathdoc UR - https://geodesic-test.mathdoc.fr/item/MM3_2021_25_1_a0/ ID - MM3_2021_25_1_a0 ER -