1. The Lambda Calculus: Its Syntax and Semantics;Barendregt,1984
2. Automatic synthesis of typed Λ-programs on term algebras;Böhm;Theoret. Comput. Sci.,1985
3. Conservative extension of type theories;Breazu-Tannen,1987
4. Proof of a conjecture on polymorphic lambda models with all types non-empty;Breazu-Tannen,1987