Short: <a href="http:&#x2F;&#x2F;a-little-book-of-r-for-time-series.readthedocs.org&#x2F;en&#x2F;latest&#x2F;src&#x2F;timeseries.html" rel="nofollow">http:&#x2F;&#x2F;a-little-book-of-r-for-time-series.readthedocs.org&#x2F;en...</a>
or <a href="http:&#x2F;&#x2F;people.duke.edu&#x2F;~rnau&#x2F;411arim.htm" rel="nofollow">http:&#x2F;&#x2F;people.duke.edu&#x2F;~rnau&#x2F;411arim.htm</a><p>And for a longer, a book by the author of R forecast library: <a href="https:&#x2F;&#x2F;www.otexts.org&#x2F;fpp&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.otexts.org&#x2F;fpp&#x2F;</a>