1. Sull’impostazione assiomatica del calcolo delle probabilità;de Finetti;Annali Triestini dell’Università di Trieste XIX,1949
2. The strength of the Hahn–Banach theorem;Pincus,1974
3. Statistical Reasoning with Imprecise Probabilities;Walley,1991
4. P.M. Williams, Coherence, strict coherence and zero probabilities, in: Fifth International Congress of Logic, Methodology and Philosophy of Science, 1975, pp. VI, 29–33.