Poole, Edward Stanley; Lane-Poole, Stanley; Margoliouth, David Samuel (1911). "Egypt/3 History" . In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 09 (11th ed.). Cambridge University Press. pp. 80–130, see page 102 para. (7) Period of Burjī Mamelukes.....On the 23rd of May 1412...."