Article about ID against "Natural" primary key

Hello friends,
I am not sure which forum is right for a question I have, hopefully it is this one.
Recently I had hot discussion with company software architects about using "Natural" primary key. The forum veterans probably know my opinion that using natural key is road to disaster. I collected pretty good collection of arguments, so I started thinking about writing an article. However, my guess is that there must already be a handful of articles about the topic. So I would appreciate a link to a good article, so I can refer to it in similar occasion or if I find i have more/better arguments to offer, I might still write my own article.
Mirko.