1. ACL2.
http://www.cs.utexas.edu/users/moore/acl2/
2. de Bakker, J.W., Scott, D.: A Theory of Programs. In IBM Seminar, Vienna, Austria (1969)
3. Bernhard, B., Reiner, H., Peter, H.S. (ed.): Verification of Object-Oriented Software: The KeY Approach. vol. 4334, LNCS, Springer (2007)
4. Bertot, Y., Casteran, P.: Interactive Theorem Proving and Program Development. Coq’Art: The Calculus of Inductive Constructions. Springer, Berlin (2004)
5. Blanqui, F., Hinderer, S., Coupet-Grimal, S., Delobel, W., Kroprowski, A.: CoLoR, a Coq Library on Rewriting and Termination. In: Geser, A., Søndergaard, H. (eds.) Proceedings of 8th International Workshop on Termination, Seattle, WA, USA (2006)