1. Doctors who refuse euthanasia ‘wicked’, expert claims. News Letter, 06.01.2009 http://www.newsletter.co.uk/news/Ignoring-a-death-wish-is.4845993.jp .
2. Guttman, Amy. 1993. Democracy. In A companion to contemporary political philosophy, ed. R.E. Goodin, and P. Pettit, 411–421. Oxford: Blackwell.
3. Guttman, Amy, and Denis Thompson. 1990. Moral conflict and political consensus. Ethics 101: 64–88.
4. Habermas, Jürgen. 1992. Faktizität und Geltung. Frankfurt am Main: Suhrkamp.
5. Habermas, Jürgen. 1995. Reconciliation through the public use of reasons: Remarks on John Rawls’s political liberalism. Journal of Philosophy 92: 109–131.