1. http://www.informatik.tu-darmstadt.de/pm/verifun/
2. Aho, A.V., Sethi, R., Ullmann, J.D.: Compilers: Principles, Techniques and Tools. Addison-Wesley, New York (1986)
3. Lecture Notes in Computer Science;A. Dold,2001
4. Flatau, A.D.: A Verified Implementation of an Applicative Language with Dynamic Storage Allocation. PhD. Thesis, Univ. of Texas (1992)
5. Giesl, J.: Termination of Nested and Mutually Recursive Algorithms. Journal of Automated Reasoning 19, 1–29 (1997)