1. Lecture Notes in Artificial Intelligence;S. Autexier,2005
2. Lecture Notes in Artificial Intelligence;S. Autexier,2006
3. Barendregt, H.: The λ-Calculus - Its Syntax and Semantics. North-Holland, Amsterdam (1984)
4. Benzmüller, C., Sorge, V.: OANTS – an open approach at combining interactive and automated theorem proving. In: Kerber, M., Kohlhase, M. (eds.) Proceedings of Calculemus-2000, St. Andrews, UK, pp. 6–7. AK Peters (August 2001)
5. Lecture Notes in Artificial Intelligence;C. Benzmüller,2006