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3. R. B. Blackman and J. W. Tukey, “The measurement of power spectra from the point of view of communications engineering,”Bell System Technical Journal, Vol. 37 (1958), pp, 185–282, pp. 485–569 (also published seperately by Dover, (1958)).
4. S. H. Crandall, “Statistical properties of response to random vibration,” Chapter 4 in Random Vibration, S. H. Crandall editor, Technology Press of M. I. T. and John Wiley and Sons, Inc. New York, (1958), pp. 77–90.
5. J. L. Doob, Stochastic Process, John Wiley and Sons, Inc. New York, (1953).