1. Dependent types;Aspinall,2005
2. Lambda calculi with types;Barendregt,1992
3. Proof-assistants using dependent type systems;Barendregt,2001
4. Domain-free pure type systems;Barthe;Journal of Functional Programming,2000
5. A simple proof of the undecidability of inhabitation in λP;Bezem;Journal of Functional Programming,1996