Tāṯwā'q fī muḥārabat al-'ahwā' wa-'l-bidā' fī al-Andalus - ʿIsā ibn Sahl, Abū al-Aṣbaġ (Tauzī' al-Markaz al-'Arabī ad-Daulā li-l-'lām, 1981)
Title on p. [4] of cover: Tres documentos sobre procesos de herejes en la España musulmana