Bosworth, C. E..szerk.: Boyle: The Political and Dynastic History of the Iranian World (A.D. 1000–1217), The Cambridge History of Iran: The Saljuq and Mongol Periods. Vol. Cambridge University Press, 7. o. (1968. december 21.) „"The Iranian scholar al-Biruni says that the Khwarazmian era began when the region was first settled and cultivated, this date being placed in the early 13th-century BC)"”
Berggren, J. L.. Pi: A Source Book. Springer, 680. o. (2014. december 21.). ISBN 978-1-4757-4217-6 „"The Persian polymath, al-Birüni, a younger contemporary of Abu'l-Wafa', calculated the perimeters of inscribed and ..."”
BĪRŪNĪ, ABŪ RAYḤĀN – Encyclopaedia Iranica. www.iranicaonline.org. (Hozzáférés: 2019. május 29.) „BĪRŪNĪ, ABŪ RAYḤĀN MOḤAMMAD b. Aḥmad (362/973- after 442/1050), scholar and polymath of the period of the late Samanids and early Ghaznavids and one of the two greatest intellectual figures of his time in the eastern lands of the Muslim world, the other being Ebn Sīnā (Avicenna).”
