1. The type theoretic interpretation of constructive set theory;Aczel,1978
2. The type theoretic interpretation of constructive set theory: Choice principles;Aczel,1982
3. The type theoretic interpretation of constructive set theory: Inductive definitions;Aczel,1986
4. P. Aczel, M. Rathjen, Notes on Constructive Set Theory. Report No. 40, Institut Mittag-Leffler, Stockholm, 2001. http://www.ml.kva.se/preprints/archive2000-2001.php
5. Admissible Sets and Structures;Barwise,1975