1. Clarke, Roger: Identified, Anonymous and Pseudonymous Transactions: The Spectrum of Choice. http://www.anu.edu.au/people/Roger.Clarke/DV/UIPP99.html
2. Lance Detweiler & The Theory of Nymity. http://www.geektimes.com/michael/culture/humor/items/Geekish/theoryOfNymity.html
3. Goldberg, Ian Avrum: A Pseudonymous Communications Infrastructure for the Internet. Ph.D. Thesis. http://www.isaac.cs.berkeley.edu/~iang/thesis-final.pdf
4. Lect Notes Comput Sci;A. Pfitzmann,2000
5. Customer Profile Exchange (CPExchange) Specification. http://www.cpexchange.org/standard/