1. Maltoni, D., Maio, D., Jain, A.K., and Prabhakar, S.: ‘Handbook of fingerprint recognition’, (Springer, New York 2003), p. 31–33
2. Wavelet domain features for fingerprint recognition
3. Biometric System Lab., University of Bologna, Cesena-Italy, www.csr.unibo.it/research/biolab/