1. The type theoretic interpretation of constructive set theory;Aczel,1978
2. The type theoretic interpretation of constructive set theory;Aczel,1982
3. The type theoretic interpretation of constructive set theory;Aczel,1986
4. P. Aczel, Non-well-founded sets, CSLI Lecture Notes 14, 1988.
5. Foundations of Constructive Mathematics;Beeson,1985