1. Abulafia, David. “Ethnic Variety and Its Implications: Frederick II’s Relations with Jews and Muslims”, Symposium Papers XXIV: Intellectual Life at the Court of Frederick II Hohenstaufen, Studies in the History of Art, 44 (1994): 213-224.
2. Abulafia, David. Frederick II: A Medieval Emperor. Nueva York - Oxford: Oxford University Press, 1988.
3. Akasoy, Anna. “Ibn Sab‘īn’s Sicilian Questions: The Text, its Sources and their Historical Context”. Al-Qantara, 29 (2008): 115-146.
4. Amari, Michele. “Questions philosophiques adressées aux savants musulmans par l'Empereur Frédéric IIe”, Journal asiatique, Ve serie, 1, (1853): 240-274.
5. Anatoli, Jacob ben. Il pungolo dei discepoli (Malmad ha-talmidim). Il sapere di un ebreo e Federico II, Introduzione, traduzione e note a cura di Luciana Pepi. Palermo: Officina di Studi Medievali, 2004.