Calmard 1996, p. 161; Algar 1990; cf. Daniel & Mahdi 2006, p. 185. Calmard, Jean (1996). "Shi'i Rituals and Power II. The Consolidation of Safavid Shi'ism: Folklore and Popular Religion". In Melville, Charles (ed.). Safavid Persia: The History and Politics of an Islamic Society. Pembroke Persian Papers. Vol. 4. London: I.B. Tauris. pp. 139–190. ISBN1-86064-023-0. Daniel, Elton L.; Mahdi, Ali Akbar (2006). Culture and Customs of Iran. Westport: Greenwood Press. ISBN0-313-32053-5.