1. De non-aequivalentie van de constructieve en de negatieve ordere-latie in het continuum;Brouwer;Indag. Math.,1949
2. Intuitionism;Heyting,1956
3. Counterexamples in intuitionistic analysis using Kripke's schema;Hull;Z. f. Math. Logik,1969
4. Formalized recursive functionals and formalized realizability;Kleene,1969
5. The foundations of intuitionistic mathematics;Kleene,1965