-- [http://www.git-scm.com/](http://www.git-scm.com/)
-- [What is this thing called source control?](http://www.slideshare.net/secret/wBsLzZb3O7cXCU)
+- [https://www.git-scm.com/](https://www.git-scm.com/)
+- [What is this thing called source control?](https://www.slideshare.net/secret/wBsLzZb3O7cXCU)
+- [https://marklodato.github.com/visualit-guide/](https://marklodato.github.com/visualit-guide/)
+- [https://www.spheredev.org/wiki/Git_for_the_lazy](https://www.spheredev.org/wiki/Git_for_the_lazy)
+- [https://www.kernel.org/pub/software/scm/git/docs/gittutorial.html](https://www.kernel.org/pub/software/scm/git/docs/gittutorial.html)
+- [http://cluedumps.mit.edu/wiki/2009/09-29](http://cluedumps.mit.edu/wiki/2009/09-29)
+- [http://eagain.net/articles/git-for-computer-scientists/](http://eagain.net/articles/git-for-computer-scientists/)
+- [https://blog.nelhage.com/archives/74](https://blog.nelhage.com/archives/74)
+- [https://blog.udemy.com/git-tutorial-a-comprehensive-guide/](https://blog.udemy.com/git-tutorial-a-comprehensive-guide/)