William L. Harper. A sketch of some recent developments in the theory of conditionals. Ifs, Conditionals, belief, decision, chance, and time, edited by William L. Harper, Robert Stalnaker, and Glenn Pearce, The University of Western Ontario series in philosophy of science, vol. 15, D. Reidel Publishing Company, Dordrecht, Boston, and London, 1981, pp. 3–38. - Robert C. Stalnaker. A theory of conditionals. A reprint of XLVII 470. Ifs, Conditionals, belief, decision, chance, and time, edited by William L. Harper, Robert Stalnaker, and Glenn Pearce, The University of Western Ontario series in philosophy of science, vol. 15, D. Reidel Publishing Company, Dordrecht, Boston, and London, 1981, pp. 41–55. - David Lewis. Counterfactuals and comparative possibility. Ifs, Conditionals, belief, decision, chance, and time, edited by William L. Harper, Robert Stalnaker, and Glenn Pearce, The University of Western Ontario series in philosophy of science, vol. 15, D. Reidel Publishing Company, Dordrecht, Boston, and London, 1981, pp. 57–85. (Reprinted from Journal of philosophical logic, vol. 2 (1973), pp. 418–446; also reprinted in Contemporary research in philosophical logic and linguistic semantics, Proceedings of a conference held at the University of Western Ontario, London, Canada, edited by D. Hockney, W. Harper, and B. Freed, The University of Western Ontario series in philosophy of science, vol. 4, D. Reidel Publishing Company, Dordrecht and Boston 1975, pp. 1–29.) - Robert C. Stalnaker. A defense of conditional excluded middle. Ifs, Conditionals, belief, decision, chance, and time, edited by William L. Harper, Robert Stalnaker, and Glenn Pearce, The University of Western Ontario series in philosophy of science, vol. 15, D. Reidel Publishing Company, Dordrecht, Boston, and London, 1981, pp. 87–104.