heading" id="Source-34"><span>Source<a class="copiable-link" href="#Source-34"> &para;</a></span></h4>

<p>Brockwell, P. J. and Davis, R. A. (1991). <cite class="cite">Time Series and Forecasting
Methods</cite>. Second edition. New York: Springer. Series A, page 555.
</p>
<p>Brockwell, P. J. and Davis, R. A. (1996). <cite class="cite">Introduction to Time Series
and Forecasting</cite>. New York: Springer. Sections 5.1 and 7.6.
</p>
<h4 class="subsubheading" id="Examples-33"><span>Examples<a class="copiable-