Si bachir, F., Abbas, S. , Benbachir, M., Benchohra, M. and N‘Guérékata, G.M. 2021. Existence and attractivity results for \(\psi\)-Hilfer hybrid fractional differential equations. CUBO, A Mathematical Journal. 23, 1 (Apr. 2021), 145–159. DOI:https://doi.org/10.4067/S0719-06462021000100145.