Mokhtar Boumaaza, Mouffak Benchohra, and Juan J. Trujillo. 2025. “Weak Solutions of Coupled Caputo Type Modification of the Erdélyi-Kober Implicit Fractional Differential Systems With Retarded and Advanced Arguments”. Jordan Journal of Mathematics and Statistics 15 (1):15-31. https://jjms.yu.edu.jo/index.php/jjms/article/view/761.