Maskukat Mashkuk biha min Ahd al-Fath al-Umawi li Hisbaniya (Doubtful Coins from the Period of the Umayyad Conquest of Hispania)
An article in The Arab Collector magazine examining coins of doubtful authenticity attributed to the period of the Umayyad conquest of Hispania (al-Andalus).
Tawfiq Ibrahim; Sebastian Gasparino