- http://gitready.com/  "learn git one commit at a time"
- [A Visual Git Reference](http://marklodato.github.io/visual-git-guide/index-en.html)
- [Clean-up outdated branches in local and remote repositories](https://railsware.com/blog/2014/08/11/git-housekeeping-tutorial-clean-up-outdated-branches-in-local-and-remote-repositories/)