1. D. Maltoni, D. Maio, A. K. Jain, and S. Prabhakar ,Handbook of Fingerprint Recognition, Springer Verlag, Berlin (2003).
2. Using fingerprint image quality to improve the identification performance of the U.S. Visitor and Immigrant Status Indicator Technology Program
3. http://www.dhs.gov/xlibrary/assets/usvisit/usvisit_edu_10-fingerprint_consumer_friendly_content_1400_words.pdf (December 10, 2009).
4. Next Generation Identification [available]: http://www.fbi.gov/hq/cjisd/ngi.htm (December 20, 2009).
5. http://www.crossmatch.com (December 10, 2009).