HASSAN , G. .; ABOUD , H. . Carolingian Renaissance time of Charlemagne (151 -199 A.H / 768 – 514 A.D) . Tishreen University Journal- Arts and Humanities Sciences Series, [S. l.], v. 38, n. 5, 2017. Disponível em: https://journal.tishreen.edu.sy/index.php/humlitr/article/view/2483. Acesso em: 1 may. 2024.