1. Carnap , R. Logical Foundations of Probability, University of Chicago Press, Chicago, Illinois, 1950
2. Dorn , G. J. W. On Deductive, Probabilistic, and Inductive Dependence in Two Axiomatic Systems of Probability Semantics, Habilitationsschrift, Salzburg, 1993
3. “Grundbegriffe der Wahrscheinlichkeitsrechnung”;Kolmogorov;Ergebnisse der Mathematik,1933
4. Alternatives to Standard First-Order Semantics”;Leblanc;Handbook of Philosophical Logic