1. Altham, J.E. J.: 1971, The Logic of Plurality, Methuen, London.
2. Altham, J.E.J. and Neil Tennant: 1975, ’sortal Quantification’, in Edward L. Keenan (ed.), Formal Semantics of Natural Language, Cambridge University Press, Cambridge.
3. Geach, P.T.: 1976, Reason and Argument, Basil Blackwell, Oxford.