1. On the 𝐿_{∞} Walsh arrays for Γ(𝑥) and 𝐸𝑟𝑓𝑐(𝑥);Rice, John R.;Math. Comp.,1964
2. John Hart et al, Handbook of Computer Approximations, Wiley, New York. (To appear.)
3. National Bureau of Standards Applied Mathematics Series, No. 55;Abramowitz, Milton,1964
4. W. J. Cody & Joseph Stoer, “Rational Chebyshev approximations using interpolation.” (To appear.)