1. de Finetti, B. La prévision: ses lois logiques, ses sources subjectives.Annales de l'Institut Henri Poincaré, 1937,7. [Translated and reprinted as “Foresight: its logical laws, its subjective sources” in H. E. Kyburg, Jr. and H. E. Smokler (Eds.)Studies in subjective probabilities. New York: Wiley, 1964]
2. de Finetti, B. Does it make sense to speak of good probability appraisers? In I. J. Good (Gen. Ed.)The scientist speculates. New York: Basic Books, 1962. Pp. 357–364.
3. Massengill, H. E. and Shuford, E. H., Jr. Direct vs. indirect assessment of simple knowledge structures. ESD-TR-65-542, Decision Sciences Laboratory, L. G. Hanscom Field, Bedford, Mass., 1965.
4. Ramsey, F. P.The foundation of mathematics and other logical essays. New York: Humanities Press, 1926. [The relevant essay, “Truth and probability,” is also reprinted in H. E. Kyburg, Jr. and H. E. Smokler (Eds.)Studies in subjective probabilities. New York: Wiley, 1964]
5. Roby, T. B. Belief states: a preliminary empirical study. ESD-TDR-64-238, Decision Sciences Laboratory, L. G. Hascom Field, Bedford, Mass., 1965.