References
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- Fuller , W. A. 1976 . Introduction to Statistical Time Series , New York : John Wiley .
- Jenkins , G. M. and Watts , D. G. 1969 . Spectral Analysis and Its Applications , San Francisco : Holden-Day .
- Priestley , M. B. 1981 . Spectral Analysis and Time Series, Vol. 1; Univariate Series , London : Academic Press .