This piece is, indeed, very well written. A couple of months ago I used it in a subject's work in the master program I'm enrolled, in which I analyze Erlang's features for providing software fault-tolerance. If it would be useful to anyone: https://drive.google.com/file/d/0B4R-MWo1s2mTc0hMc2Z6czU1ekU...
[1]: http://erlang.org/download/armstrong_thesis_2003.pdf