1. Bendall, L. K., 1979, Belief-theoretic Formal Semantics for First-order Logic and Probability, J. Philosophical Logic, 8:375–394.
2. Carnap, R., 1950, “Logical Foundations of Probability,” University of Chicago Press, Chicago.
3. Field, H. H., 1977, Logic, Meaning, and Conceptual Role, J. Philosophy, 74:379–409.
4. Gaifman, H., 1964, Concerning Measures on First-order Calculi, Isreal J. Math., 2:1–18.
5. Kolmogorov, A. N., 1933, Grundbegriffe der Wahrscheinlichkeitsrechnung, Ergebnisse der Math., 2:195–262.