1. A type driven theory of predication with complex types;Asher;Fundamenta Informaticae,2008
2. Subtyping dependent types;Aspinall;Theoretical Computer Science,2001
3. A. Bailey, The machine-checked literate formalisation of algebra in type theory, PhD thesis, University of Manchester, 1999.
4. An implementation of typed LF with coercive subtyping and universes;Callaghan;Journal of Automated Reasoning,2001
5. Coq, The Coq Proof Assistant Reference Manual (Version 8.3), INRIA. The Coq Development Team, 2010.