Douglas (1973, p.210) Douglas, A. Vibert (1973), "Al-Biruni, Persian Scholar, 973–1048", Journal of the Royal Astronomical Society of Canada, 67: 209–211, Bibcode:1973JRASC..67..209D{{citation}}: Invalid |ref=harv (help)
iranicaonline.org
C. Edmund Bosworth, "BĪRŪNĪ, ABŪ RAYḤĀN i. Life" in Encyclopedia Iranica. Access date April 2011 at [1]
D. N. MacKenzie, Encyclopaedia Iranica, "CHORASMIA iii. The Chorasmian Language" [2] "Chorasmian, the original Iranian language of Chorasmia, is attested at two stages of its development..The earliest examples have been left by the great Chorasmian scholar Abū Rayḥān Bīrūnī.
