The Contributions of Islamic Frontier Fortresses During the Early Abbasid Era (132-232 AH). (Frontier Fortresses between the Abbasid State and the Byzantine Empire as a Case Study). Thi Qar Arts Journal, Huminites, v. 2, n. 41, p. 219–243, 2023. DOI: 10.32792/tqartj.v2i41.400. Disponível em: http://mail.jart.utq.edu.iq/index.php/main/article/view/400. Acesso em: 8 jan. 2025.