1. S. Agerholm. A HOL Basis for Reasoning about Functional Programs. PhD thesis, BRICS, University of Aarhus, 1994. Also available as BRICS report RS-94-44.
2. R. Burstall and J. McKinna. Deliverables: a categorical approach to program development in type theory. Technical Report ECS-LFCS-92-242, Edinburgh University, 1992.
3. Th. Coquand. An analysis of Girard's paradox. In Proc. 1st Symp. on Logic in Computer Science, pages 227–236. IEEE Computer Soc. Press, 1986.
4. P. Freyd, P. Mulry, G. Rosolini, and D. Scott. Extensional PERs. Information and Computation, 98:211–227, 1992.
5. P. Freyd. Algebraically complete categories. In A. Carboni, M.C. Pedicchio, and G. Rosolini, editors, Proceedings of the 1990 Como Category Theory Conference, volume 1488 of Lecture Notes in Mathematics, pages 95–104, Berlin, 1991. Springer.