Oliveira Borges, Marco. “The Strategic Importance of Knowledge of the Territory in the Formation of a Defensive System: The Case of Sintra (Portugal) During the Islamic Period”. Anuario de Historia Regional y de las Fronteras 22, no. 2 (October 5, 2017): 17–48. Accessed August 24, 2024. https://revistas.uis.edu.co/index.php/anuariohistoria/article/view/6336.