Types for Proofs and Programs Second International Workshop, TYPES 2002, Berg en Dal, The Netherlands, April 24-28, 2002, Selected Papers Geuvers Herman Heftet / 2003 / Engelsk
Interactive Theorem Proving Second International Conference, ITP 2011, Berg en Dal, The Netherlands, August 22-25, 2011, Proceedings Van Eekelen, Marko Heftet / 2011 / Engelsk
Intelligent Computer Mathematics 10th International Conference, CICM 2017, Edinburgh, UK, July 17-21, 2017, Proceedings Geuvers Herman Heftet / 2017 / Engelsk
