1. Peter Aczel, The Type Theoretic Interpretation of Constructive Set Theory, in: MacIntyre, A., Pacholski, L., Paris, J. (eds), Logic Colloquium’ 77, (North Holland, Amsterdam, 1978). pp2, 13, 16
2. Peter Aczel, The Type Theoretic Interpretation of Constructive Set Theory: Choice Principles, in: Troelstra, S. S., van Dalen, D. (eds),The L. E. J. Brouwer Centenary Symposium, (North Holland, Amsterdam, 1982). 2, 16
3. Peter Aczel, The Type Theoretic Interpretation of Constructive Set Theory: Inductive Definitions, in: Marcus, R. B. et al. (eds), Logic, Methodology and Philosophy of Science VII, (North Holland, Amsterdam, 1986). 2, 13, 16, 17
4. Barras et al. The Coq Proof Assistant Reference Manual, Version 6.1 INRIA Technical Report, 1996. 1
5. Thierry Coquand, Metamathematical Investigations of a Calculus of Constructions. In P. Oddifredi (editor), Logic and Computer Science. Academic Press, 1990. 1