This transcription of Clojure - An Introduction for Lisp Programmers has extracted references to some of the papers mentioned in there:
- Phil Bagwell 2000 Ideal Hash Trees
- Baker, H. G. 1993. Equal rights for functional objects or, the more things change, the more they are the same (Hickey: “Equal! Equal! Have you read Henry Baker’s great paper on equality and object identity? Anybody? It’s a great paper. It’s still great, and it’s still correct.”)
- Huet, G 1997 Functional Pearl, the Zipper