E. Fernandes Cardoso, «The door of the caliph in the Umayyad al-Andalus: from the conceptualization to the articulation of ceremonial (10th-11th centuries).: Doctoral thesis in History presented at the University of Lisbon in 15th July, 2020. Supervised by Professor Hermenegildo Fernandes and Professor Hugh Kennedy», Medievalista, n. 30, pp. 365–385, Jul. 2021.