I thought this particular article gave a balanced, high-level overview, along with enough detail and references to provide a good starting point.

Yes, perhaps it's a bit light-weight, but as an introduction I thought it did a good job.

Unusual in the sense that getting vouched as an outlier, not necessarily as an indication of the article quality.

What makes you say it's banned? From that link it doesn't seem to be.

Turn on showdead. (but even if you don't, the fact that the last submission before this one was 3 months ago is a hint)