1. Principles and Applications of Random Noise Theory;BENDAT,1958
2. The Measurement of Power Spectra;BLACKMAN,1958
3. What is the F.F.T.?;COCHRAN;Proc. IEEE,1962
4. An algorithm for the machine calculation of complex Fourier series;COOLEY;Math. Comp.,1965
5. Correlation Techniques;LANGE,1967