Omar Khayyam. Impact on the literary ...
Jos Biegstraaten, “Khayyam, Omar xi. Impact on the literary and social scene abroad," Encyclopaedia Iranica, Online Edition, 15 December 2008, available at www.iranica.com/articles/khayyam-xi
Jos Biegstraaten, “Khayyam, Omar xi. Impact on the literary and social scene abroad," Encyclopaedia Iranica, Online Edition, 15 December 2008, available at www.iranica.com/articles/khayyam-xi