1. Crafting a Proof Assistant;Asperti,2006
2. The Type Theoretic Interpretation of Constructive Set Theory;Aczel,1978
3. Encoding modal logics in logical frameworks;Avron;Studia Logica,1998
4. Towards an evolutionary formal software-development using CASL;Autexier,1999
5. Foundational proof-carrying code;Appel,2001