Full reference OpenMind biblio ref
Rashed, Roshdi, and Bijan Vahabzadeh. 2000. ʿOmar Khayyām, the Mathematician. New York; Winona Lake, IN: Bibliotheca Persica Press; Eisenbrauns.
{ Roshdi Rashed, Bijan Vahabzadeh, 2000 #953 }