, 1995, A closet realist, in K. Gavroglu, J. Stachel & M. W. Wartofsky (eds.), Science, mind and art, Dordrecht, Springer, pp. 187-201.
, 1989a, The qualitative significance of quantitative representation, in B. Glassner & J. D. Moreno (eds.), The qualitative-quantitative distinction in the social sciences, Dordrecht, Springer, pp. 29-42.