1. Arneson, R. J. (2009). What do we owe to distant needy strangers? In J. A. Schaler (Ed.), Peter singer under fire: the moral iconoclast faces his critics (pp. 267–293). Open Court.
2. Brand-Ballard, J. (2005). Review of the moral demands of affluence., Notre dame philosophical reviews. http://ndpr.nd.edu/news/the-moral-demands-of-affluence/.
3. Cullity, G. (2003). Asking too much. The Monist, 86(3), 402–418.
4. Cullity, G. (2006). The moral demands of affluence. Clarendon Press.
5. Fishkin, J. S. (1982). The limits of obligation. Yale University Press.