[1] Coletti G., Scozzafava R.: Characterization of coherent conditional probabilities as a tool for their assessment and extension. Internat. J. Uncertainty, Fuzziness and Knowledge–Based Systems 4 (1996), 103–127 MR 1390898 | Zbl 1232.03010

[2] Coletti G., Scozzafava R.: Exploiting zero probabilities. In: Proceedings EUFIT ’97, ELITE Foundation, Aachen, 1997, pp. 1499–1503

[3] Finetti B. de: Les probabilité nulles. Bull. Sci. Math. 60 (1936), 275–288

[4] Scozzafava R.: A survey of some common misunderstandings concerning the role and meaning of finitely additive probabilities in statistical inference. Statistica 44 (1984), 21–45 MR 0766688 | Zbl 0557.62004