Ayer, A. J. 1963. “Two Notes on Probability,” in The Concept of a Person and Other Essays. Macmillan, 188–208.Ramsey (1922 and 1931) are criticisms of Keynes’ logical theory of probability. Keynes (1931) is his response to Ramsey.
Bunge, Mario. 1981. “Four Concepts of Probability,” Applied Mathematical Modelling 5: 306–312.
Bunge, Mario. 1988. “Two Faces and Three Masks of Probability,” in Evandro Agazzi (ed.), Probability in the Sciences. Kluwer Academic, Dordrecht and London. 27–50.
Carnap, Rudolf. 1945. “The Two Concepts of Probability,” Philosophy and Phenomenological Research 5.4: 513–532.
Keynes, John Maynard. 1931. “Ramsey as a Philosopher,” The New Statesman and Nation, 3 October.
Keynes, John Maynard. 1963. “F. P. Ramsey 1903–1930,” in John Maynard Keynes, Essays in Biography (new edn.). Norton, New York. 239–254.
Perry, Stephen R. 1995. “Risk, Harm, and Responsibility,” in David G. Owen (ed.), Philosophical Foundations of Tort Law. Oxford University Press, New York. 321–346.
Popper, Karl R. 1957. “The Propensity Interpretation of the Calculus of Probability, and the Quantum Theory,” in S. Körner (ed.), Observation and Interpretation: A Symposium of Philosophers and Physicists: Proceedings of the Ninth Symposium of the Colston Research Society, held in the University of Bristol, April 1st–April 4th, 1957. Butterworths, London. 65–70.
Popper, Karl R. 1959. “The Propensity Interpretation of Probability,” British Journal for the Philosophy of Science 10: 25–42.
Ramsey, Frank. P. 1922. “Mr. Keynes on Probability,” Cambridge Magazine 11.1: 3–5. [Reprinted in Ramsey 1989.]
Ramsey, Frank. P. 1931. “Truth and Probability,” in Frank. P. Ramsey, The Foundations of Mathematics and Other Logical Essays (ed. by R. B. Braithwaite). Kegan Paul & Co., London. 58–100.
Ramsey, Frank. P. 1989 . “Mr Keynes on Probability,” British Journal for the Philosophy of Science 40.2: 219–222.
Ayer (1963) and Carnap (1945) are classic papers in philosophy of probability, and Popper (1957 and 1959) are famous statements of his “propensity” theory of probability, a modern development of which seems to be the preferred version of objective probability theory in modern philosophy (Gillies 2000: 136).
Perry (1995) is a fascinating paper examining risk versus uncertainty in the context of law and litigation.
Gillies, D. A. 2000. Philosophical Theories of Probability. Routledge, London.