1. Saturated intuitionistic theories;Aczel,1968
2. Gödel’s functional (“Dialectica”) interpretation;Avigad,1998
3. Semantic construction of intuitionistic logic;Beth;Kon. Ned. Akad. u. Wet.,1956
4. The Foundations of Mathematics;Beth,1959
5. Sur la logique de M. Brouwer;Barzin;Bull. Acad. Royale Belgique,1927