1. The Lambda Calculus, its Syntax and Semantics;Barendregt,1984
2. A note on weak diamond properties;de Bruijn,1978
3. Proving termination with multiset orderings;Dershowitz;Comm. ACM,1979
4. Relative termination;Geser,1990
5. The Church-Rosser property and a result in combinatory logic;Hindley,1964