Beginner's Guide to Time Series Analysis
quantstart.com
quantstart.com
https://www.quantstart.com/articles/Serial-Correlation-in-Ti...
If you want a good beginner tutorial, these are the ones I recommend most to people.
http://a-little-book-of-r-for-time-series.readthedocs.org/en...
http://www.stat.pitt.edu/stoffer/tsa3/R_toot.htm
and if you want a bit more rigorous presentation then I recommend this book:
[0] http://www.stat.pitt.edu/stoffer/tsa3/R_toot.htm