1. See Gerald F. Gaus, ‘Dirty Hands’, in R. G. Frey and Christopher Heath Wellman (eds.), A Companion to Applied Ethics, Oxford: Blackwell, 2003, pp. 167–79.
2. See Terrance C. McConnell, ‘Moral Residue and Dilemmas’, in H. E. Mason (ed.), Moral Dilemmas and Moral Theory, New York: Oxford University Press, 1996.