1. Daugman, J.G., 1994. Biometric Personal Identification System Based on Iris Analysis. US patent 5,291,560, Patent and Trademark Office, Washington, DC.
2. The United Arab Emirates iris study: Results from 200 billion iris cross-comparisons;Daugman,2005
3. Dillingham, G.L., 2002. Avaition Security. Registered Traveller Programme Policy and Implementation Issues. General Accounting Office, USA (Online). Available from: (Last Accessed 12 August 2005).
4. Flom, L., Safir, A., 1987. Iris recognition system. US Patent No. 4,641,349, Patent and Trademark Office, Washington, DC.
5. Heath, D., 2001. An Overview of Biometrics Support in NetWare Through NMAS/Novel, USA (Online). Available from: (Last Accessed 12 September 2005).