1. Hettinger, E. C. (1989). Justifying intellectual property. Philosophy and Public Affairs, 18, 31–52.
2. Hughes, J. (1988). The philosophy of intellectual property. Georgetown Law Journal, 77(2), 287–366.
3. Jaffe, A. B., & Lerner, J. (2004). Innovation and its discontents. Princeton: Princeton University Press.
4. Janis, M., & Kesan, J. (2002). Intellectual property protection for plant innovation. Nature Biotechnology, 20, 1161–1164. http://www.nature.com/nbt/journal/v20/n11/full/nbt1102-1161.html
5. Kuflik, A. (1995). Moral foundations of intellectual property. In D. Johnson & H. Nissenbaum (Eds.), Computers, ethics, and social values (pp. 169–180). Saddle River: Prentice Hall.