1. J. W. Cooley & J. W. Tukey, ?An Algorithm for the Machine Calculation of Complex Fourier Series,? Math. Comput., Vol. 19, no. 2, pp. 297?301, Reprinted in Digital Signal Processing, ed. L. R. Rabiner & C. M. Rader, pp. 223?227, New York: IEEE Press, 1972, Apr. 1965.
2. E. O. Brigham, The Fast Fourier Transform. Englewood, NJ: Prentice-Hall, Inc., 1974.
3. I. J. Good, ?The Interaction Algorithm and Practical Fourier Analysis,? J. R. Statist. Soc. B, Vol. 20, no. 2, pp. 361?372, 1958, Addendum in J. R. Statist. Soc. B, vol. 22, no. 2, pp. 372?375, 1960.
4. P. Rudnick, ?Note on the Calculation of Fourier Series,? Math. Comput., Vol. 20, no. 3, pp. 429?430, Jul. 1966.
5. G. C. Danielson & C. Lanczos, ?Some Improvements in Practical Fourier Analysis and Their Application to X-ray Scattering From Liquids,? J. Franklin Inst., Vol. 233, no. 4 and 5, pp. 365?380 and 435?452, Apr. and May 1942.