1. Ashford, Elizabeth. 2009a. The Alleged Dichotomy between Positive and Negative Rights and Duties. In Beitz and Goodin, eds., Global Basic Rights. Oxford: Oxford University Press
2. Ashford, Elizabeth. 2009b. In What Sense is the Right to Subsistence a Basic Right? Journal of Social Philosophy. 40(4):488–503
3. Beitz, Charles and Robert Goodin. 2009. Basic Rights and Beyond. In Beitz and Goodin, eds., Global Basic Rights. Oxford: Oxford University Press
4. Blackburn, Simon. 2005. Rights. In Blackburn, ed., The Oxford Dictionary of Philosophy, Second Edition. Oxford: Oxford University Press
5. Coburn, Robert. 1976. On Feeling Hungry. Journal of Social Philosophy. 7: 11-16