A History of All Nations (Digitized Nov 23, 2005 ed.). Original from the University of Michigan. 1864.
Reed, Elizabeth Armstrong (1893). "XI". Persian Literature: Ancient and Modern. Original from Harvard University (Digitized Feb 5, 2007 ed.). S. C. Griggs and company. p. 419.
Rosenberg, Donna (1997). "page 116-118". Folklore, Myths, and Legends: A World Perspective. McGraw-Hill Professional. p. 536. ISBN0-8442-5780-X.
Khayyam, Omar; Edward FitzGerald (1900). "The Sha Nameh, pages 50-67". In Translated by Herman Bicknell, James Ross (ed.). Persian Literature... Original from the University of Michigan. Vol. 1. Ḥāfiẓ, Saʻdī (revised ed.). The Colonial press. p. 50-.