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Per Martin-Löf
100 years of Zermelo's axiom of choice
2009
in: Logicism, intuitionism, and formalism, Dordrecht : Springer
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The Hilbert-Brouwer controversy resolved?
2008
in: One hundred years of intuitionism (1907–2007), Dordrecht : Springer
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Analytic and synthetic judgements in type theory
1994
in: Kant and contemporary epistemology, Dordrecht : Springer
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Truth of a proposition, evidence of a judgement, validity of a proof
1987
Synthese 73/3
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