1. ‘Information Technology – Biometric Performance Testing and Reporting – Part 1: Principles and Framework’. ISO/IEC 19795-1:2006: section 6.4.6.
2. Flom L; Safir A. ‘Iris Recognition System’. US Patent No. 4641394, 1987.
3. Daugman JG. ‘Biometric Personal Identification Based on Iris Analysis’. US Patent 5,291,560, 1994.
4. ‘Recognising Persons by their Iris Patterns’, Chapter 5;Daugman,1998