Nāṣir-i Khusraw. (2011). In Encyclopædia Britannica. Retrieved from http://www.britannica.com/EBchecked/topic/403951/Nasir-i-Khusraw "(born 1004, Qubādiyān, Merv, Khorāsān [Iran]—died c. 1072, /77, Yumgān, Badakshān, Central Asia [now in Afghanistan]), poet, theologian, and religious propagandist, one of the greatest writers in Persian literature."
Nasir Khusraw. (2005). In Internet Encyclopædia of Philosophy. Retrieved from http://www.iep.utm.edu/khusraw/In 1004, Abu Mo’in Hamid al-Din Nasir ibn Khusraw was born in Qobadiyan, the district of Marv, in the eastern Iranian province of Khurasan.