1. Carnap, R.,Logical Foundations of Probability, University of Chicago Press, Chicago, 1950.
2. Keynes, J. M.,A Treatise on Probability, Macmillan, London 1921.
3. Salmon, W. C.et al., Statistical Explanation and Statistical Relevance, Pittsburgh University Press, Pittsburgh, 1971.
4. Salmon, W. C., ?Confirmation and Relevance?, inInduction, Probability, and Confirmation (ed. by G. Maxwell and R. M. Anderson, Jr.), University of Minnesota Press, Minneapolis, 1975, pp. 3?36.