1. J. Cowger, Friction Ridge Skin: Comparison and Identification of Fingerprints. Elsevier, New York, 1983.
2. Federal Bureau of Investigation, The Science of Fingerprints: Classification and Uses. U.S. Government Printing Office, Washington, D. C., 1984.
3. National Institute of Standards and Technology, Guideline for The Use of Advanced Authentication Technology Alternatives. Federal Information Processing Standards Publication 190, 1994.
4. J. Rafferty and J. Wegstein, The LX39 latent Fingerprint Matcher. U.S.A. Government Publication. National Bureau of Standards, Institute for Computer Sciences and Technology, 1978.
5. D.R. Ashbaugh, Quantitative-Qualitative Friction Ridge Analysis: An Introduction to Basic and Advanced Ridgeology, CRC Press, Boca Raton, 1999.