Hidden Variables in Conditional Logic, Theoria 40 (1974), pp. 176-190
Incompleteness Assertion and Belnap Connectives, Contemporary Research in Philosophical Logic and Linguistic Semantics, ed. D.Hockney and W.Harper (Reidel Publishing Co., 1975), pp. 43-70
Probabilities of Conditionals, in W. Harper and C.A. Hooker (eds.) Foundations of Probability and Statistics, Volume l (Reidel, 1975), pp. 261-308
Report on Conditionals, Teorema 6 (1976), pp. 5-25
A Temporal Framework for Conditionals and Chance, Philosophical Review 89 (1980), pp. 91-108
Theories and Counterfactuals, in Action, Knowledge and Reality, ed. H.N. Castaneda (Bobbs-Merrill Co., 1975)
Singular Terms, Truth-Value Gaps and Free Logic, Journal of Philosophy 63 (1966), pp. 481-495
The Completeness of Free Logic, Zeitschrift fur Mathem. Logik und Grundlagen der Mathematik 12 (1966)
A Note on Bacon's Alternative to Russell, Philosophical Studies 18 (1967), pp. 47-48
On Free Description Theory (with Karel Lambert), Zeitschrift fur Mathem. Logik und Grundlagen der Mathematik 13 (1967), 225-240
A Topological Proof of the Lowenheim-Skolem, Compactness, and Strong Completeness Theorems for Free Logic, Zeitschrift fur Math. Logik und Grundlagen der Mathematik 14 (1968), pp. 245-254
Presuppositions, Supervaluations, and Free Logic, in K. Lambert (ed.), The Logical Way of Doing Things, New Haven: Yale University Press (1969), pp. 67-91
On (Ix)(x = Lambert) in W. Spohn, B. van Fraassen, and Brian Skyrms (eds.), Existence and Explanation. Dordrecht: Kluwer, 1991, pp. 1-18
Meaning Relations among Predicates, Nous l (1967), pp. 160-179
Meaning Relations and Modalities, Nous 3 (1969), pp. 155-167
Compactness and Lowenheim-Skolem Proofs in Modal Logic, Logique et Analyse 12 (1969), pp. 167-178
Meaning Relations, Possible Objects, and Possible Worlds (with K. Lambert), in K. Lambert (ed.), Philosophical Problems in Logic (Reidel, 1970), pp. l-20
Bressan and Suppes on Modality, in K.F. Schaffner and R.S. Cohen (eds.), PSA 1972 (Reidel Publishing Co., 1974)
The Only Necessity is Verbal Necessity, Journal of Philosophy 74 (1977), pp. 71-85
Essence and Existence, American Philosophical Quarterly Monograph Series No. 12 (1978)
Modality, in H. Kyburg (ed.), Current Research in Philosophy of Science (Philosophy of Science Association 1979)
On Characterizing Popper and Carnap Probability Functions (with W. L. Harper and H. Leblanc), in H. Leblanc, R. Gumb, and R. Stern (eds.) Essays in Epistemology and Semantics. New York: Haven Publications, 1984
Fine-grained opinion, probability, and the logic of belief, Journal of Philosophical Logic, 24 (1995), 349-377
Frequency and the Myth of Probability, pp. 55-67 in H. Poser and U. Dirks, Hans Reichenbach: Philosophie im Umkreis der Physik. Berlin: Akademie Verlag, 1998
The Labyrinth of Quantum Logics, Boston Studies in Philosophy of Science 13 (1972), pp. 224-254
Semantic Analysis of Quantum Logic, pp. 80-113 in C.A. Hooker (ed.), Contemporary Research in the Foundations and Philosophy of Quantum Theory (Dordrecht: Reidel, 1973)
Assumptions and Interpretations of Quantum Logic, in Current Issues in Quantum Logic (1981) -- see Books, above
A Semantic Analysis of Bohr's Philosophy of Quantum Mechanics (jointly with C.A. Hooker), in Harper, W.L. and C.A. Hooker (eds.), Foundations of Probability and Statistics, Volume 3 (Dordrecht: Reidel, 1975), pp. 222-241
Singular Terms, Truth-Value Gaps and Free Logic, Journal of Philosophy 63 (1966), pp. 481-495
Presupposition, Implication, and Self-Reference, Journal of Philosophy 65 (1968), pp. 136-152
Presuppositions, Supervaluations, and Free Logic, in K. Lambert (ed.), The Logical Way of Doing Things, New Haven: Yale University Press (1969), pp. 67-91
Truth and Paradoxical Consequences, in R. Martin (ed.), The Paradox of the Liar (New Haven: Yale University Press 1970), pp. 13-23
Rejoinder: On a Kantian Conception of Language, Ibid., pp. 59-66
The World We Speak Of, and the Language We Live In, pp. 213-221 in Philosophy and Culture: Proc. of the XVII-th World Congress of Philosophy (Montreal, 1983). Montreal: Editions du Beffroi, 1986
Identity in Intensional Logic: Subjective Semantics, Versus 44/45 (1986), 201-219 (appeared in 1988)