1. Adar, E. & Huberman, B.A., (2000). Free Riding on Gnutella. Available online at http://www.firstmonday.dk/issues/issue5_10/adar/
2. Bornstein Pittman, R.S. (1992). Perception Without Awareness, New York, Guilford Press.
3. Erwin, P. (2001). Attitudes and Persuasion, Philadelphia, Psychology Press.
4. Fogg, B.J. (2000). Persuasive Technologies and Netsmart Devices in: Bergman, E. (ed.) Information Appliances and Beyond, Chapter 11, Morgan Kaufman.
5. Gnutella Developer Forum, http://groups.yahoo.com/group/the_gdf/