Recursive references

Concrete Mathematics, by Graham, Knuth, and Patashnik: A good discrete math book telling you everything you ever wanted to know about recurrences. The first section is about the Towers of Hanoi.
A Hanoi index: A thorough index of Towers of Hanoi links.
End of the world: Believe it or not, somebody has actually connected the monks to the Web so that we can hurry them along with their task. (I've had a few problems with this link recently.)
A link about self-reference: A short index of links about self-reference (closely tied to recursion).
This site.