1. Nat. Bur. Standards Appl. Math. Series,1964
2. National Physical Laboratory Mathematical Tables;C. W. Clenshaw,1962
3. Clenshaw, C. W., Miller, G. F., and Woodger, M., Handbook Series Special Functions—Algorithms for Special Functions I, Num. Math. 4, 1963, pp. 403–419.
4. Cody, W. J., Software for the Elementary Functions, in Mathematical Software, J. R. Rice (Ed.), Academic Press, N.Y. and London, 1971, pp. 171–186.
5. Cody, W. J., The FUNPACK Package of Special Function Subroutines, ACM Trans. Math. Software, 1, 1975, pp. 13–25.