1. Induction and hypothesis;BARKER,1957
2. The logical foundations of probability;CARNAP,1950
3. La prevision: ses lois logiques, ses sources subjectives;DE FINETTI;Annates de l'Institut Henri Poincaré,1937
4. Concerning measures in first-order calculi;GAIFMAN;Israel Journal of Mathematics,1964
5. Aspects of scientific explanation;HEMPEL,1965