1. R. B. Blackman and J. W. Tukey, “The measurement of power spectra from the point of view of communications engineering”,Bell System Technical Journal 37, 185–282, 485–569 (1958).
2. J. L. Doob, “Stochastic Process” John Wiley & Sons, Inc. (1953).
3. D. T. Ross, “Sampling and quantizing”, Chaper II innotes on Analog-Digital Conversion Techniques, Alfred K. Susskind editor, Technology Press of M.I.T. and John Wiley & Sons, Inc. New York, (1957).
4. J. W. Tukey, and R. W. Hamming, “Measuring noise color”Bell Telephon Lab. Memo., MM-49-110-119 (1949).
5. B. Widrow, “A study of rough amplitude quantization by means of Nyquist sampling theory”,Trans. I.R.E., PGCT-3, 266–276 (1956)