“Epistles of the Brethren of Purity. On Arithmetic and Geometry: An Arabic Critical Edition and English Translation of EPISTLES 1 & 2 By Nader El-Bizri, Ed. And Trans. (Oxford, NY: Oxford University Press in Association With the Institute of Ismaili Studies, 2012. 400 pages.)”. 2014. American Journal of Islam and Society 31 (1): 116-20. https://doi.org/10.35632/ajis.v31i1.1027.