Requirements and Source control - Eric Sink

I was googling for branching in source control and found a very good article on Eric Sinks Blog. Not that he explained it very well but his way of explaining with examples is exceptional. You can read it at the following links

Source Control: http://www.ericsink.com/scm/source_control.html

While I was there I also read the following article about requirements; a very good one!

Requirements: http://www.ericsink.com/articles/Requirements.html