1. Anjum, R. L. and S. Mumford. ‘The metaphysics of powers: their grounding and their manifestations’. InPowers: Their Groundings and their Realizations, edited by A. Marmadoro. London: Routledge, forthcoming 2010.
2. Bhaskar, R.A Realist Theory of Science.Leeds: Leeds Books, 1975.
3. Bhaskar, R.Dialectic: The Pulse of Freedom.London: Verso, 1993.
4. Cartwright, N.Nature's Capacities and their Measurement.Oxford: Oxford University Press, 1989.
5. Collins, J., N. Hall and L. A. Paul. ‘Counterfactuals and causation: history, problems and prospects’. InCausation and Counterfactuals, edited by J. Collins, N. Hall and L. A. Paul, 1-57. Cambridge, MA: MIT Press, 2004.