1. The Lambda Calculus. Its Syntax and Semantics;Barendregt,1984
2. Foundations of Constructive Mathematics;Beeson,1985
3. Proof theoretical aspects of self-referential truth;Cantini,1996
4. Feasible operations and applicative theories based on λη;Cantini;Mathematical Logic Quarterly,2000
5. Choice and uniformity in weak applicative theories;Cantini,2005