1. Ackerman, B. (2013) Reviving democratic citizenship? Politics & Society 41 (2): 309–317.
2. Agamben, G. (2010) The Signature of all Things: On Method. New York: Zone Books.
3. Althusser, L. (1990) Philosophy and the Spontaneous Philosophy of the Scientists. London: Verso.
4. Brennan, G. (1995) The contribution of economics. In: R.E. Goodin and P. Pettit. (eds.) A Companion to Contemporary Political Philosophy. Oxford: Blackwell.
5. Brennan, G. and Hamlin, A. (2007) Positive Constraints on Normative Political Theory. Manchester: MANCEPT Working Paper Series.