Blake, Stephen P., ed. (2013), "Safavid, Mughal, and Ottoman Empires", Time in Early Modern Islam: Calendar, Ceremony, and Chronology in the Safavid, Mughal and Ottoman Empires, Cambridge: Cambridge University Press, pp. 21–47, doi:10.1017/CBO9781139343305.004, ISBN978-1-107-03023-7, retrieved 2021-11-10