1. A. D. Aleksandrov, A. N. Kolmogorov, and M. A. Lavrent'ev, eds., Mathematics: Its Content, Methods and Meaning 1 (Cambridge, Mass.: MIT Press, 1963). Translated by S. H. Gould and T. Bartha from Matematika: Eë Soderzhanie, Metody i Znachenie (Akad. Nauk SSSR, 1956).
2. Errett Bishop, Foundations of Constructive Analysis (N.Y.: McGraw-Hill, 1967).
3. Baldassarre Boncompagni, ed., Algoritml de Numero Indorum. Trattati D'Aritmetica 1 (Rome, 1857).
4. Solomon Gandz, "The Mishnat Ha Middot," Proc. Amer. Acad. for Jewish Research 4 (1933), 1–104. Reprinted in S. Gandz, Studies in Hebrew Astronomy and Mathematics (New York: Ktav, 1970), 295–400.
5. Solomon Gandz, "Sources of al-Khowârizmi's Algebra," Osiris 1 (1936), 263–277.