References
Haim Gaifman
A theory of higher order probabilities
2016
in: Readings in formal epistemology, Dordrecht : Springer
Vagueness, tolerance and contextual logic
2010
Synthese 174/1
Reasoning with limited resources and assigning probabilities to arithmetical statements
2004
Synthese 140/1-2
On the empirical application of mathematics a comment
1986
in: The kaleidoscope of science I, Dordrecht : Springer