Nagel (1990), pp. 578-586. (EN) Tilman Nagel, Buyids, in Ehsan Yarshater, Encyclopædia Iranica, IV/6: Burial II-Calendars II, Londra e New York, Routledge & Kegan Paul, 1990, pp. 578-586, ISBN978-0-71009-129-1.
Bosworth (2010), pp. 359-362. (EN) Clifford E. Bosworth, Kākuyids, in Ehsan Yarshater, Encyclopædia Iranica, XV/4: Kafir Kala–Ḵamsa of Jamāli, Londra e New York, Routledge & Kegan Paul, 2010, pp. 359-362, ISBN978-1-934283-26-4.