1. Anderson, A.R. and N. Belnap, Jr. et al. [1975], Entailment: The Logic of Relevance and Necessity (Princeton: Princeton University Press).
2. Cummins, R. and Gottlieb, D. [1972], ‘On an Argument for Truth-Functionality,’ American Philosophical Quarterly, 9 265–269.
3. Davidson, D. [1967], ‘Causal Relations,’ Journal of Philosophy, 64 691–703.
4. Davidson, D. [1975], ‘True to the Facts,’ Journal of Philosophy, 66 748–764.
5. Dunn, J.M. [1981], ‘Quantum mathematics’ in PSA 1980, vol. 2, eds., P. Asquith and R. Giere (Lansing, Michigan: The Philosophy of Science Association) 512–531.