1. Habermas, J. (1995) ‘Kant’s Idea of Perpetual Peace, with the Benefit of Two Hundred Years’ Hindsight’ in J. Bohman and M. Lutz-Bachmann (eds) (1997), Perpetual Peace: Essays on Kant’s Cosmopolitan Ideal, MIT Press: Cambridge, MA and London.
2. Habermas, J. (1992) Between Facts and Norms: Contributions to A Discourse Theory of Law and Democracy, 1996, trans. W. Rehg, Cambridge: Polity Press.
3. Kettner, M. (2002) ‘The Disappearance of Discourse Ethics in Habermas’ Between Facts and Norms’ in R. Von Schomberg and K. Baynes (eds), Discourse and Democracy: Essays on Habermas’s Between Facts and Norms, Albany, NY: State University of New York Press.