1. Albert Einstein and Leopold Infeld, "The Evolution of Physics", Edited by C.P. Snow, Cambridge University Press, 1938.
2. L. Infeld and T. E. Hull, "The Factorization Method", Rev. Mod. Phys. 23, Issue 1, 1951.
3. T. E. Hull, Thomas F. Fairgrieve, Ping Tak Peter Tang, "Implementing Complex Elementary Functions Using Exception Handling", ACM Transactions on Mathematical Software, Volume 20 (1994), pp 215-244, Corrigenda, p553.