1. Australian e-Government & Information Management (cited October 10, 2008), http://www.finance.gov.au/e-government/index.html
2. Burr, W. E., et al.: Electronic Authentication Guideline. In: NIST Special Publication 800-63. NIST (cited October 15, 2008), http://csrc.nist.gov/publications/PubsSPs.html
3. Canadian e-authenticaiton (2004) (cited October 10, 2008), http://www.ic.gc.ca/epic/site/ecic-ceac.nsf/en/h_gv00090e.html
4. Lecture Notes in Computer Science;S. Creese,2004
5. Lecture Notes in Computer Science;J. Covington,2004