1. S. Nanavati, M. Thieme, R. Nanavati, Biometrics: Identity Verification in a Networked World, pp. 123–131, Wiley, New York, 2002.
2. J. Ashbourn, Biometrics: Advanced Identity Verification, Springer, Berlin, 2002, pp. 61–62.
3. W.S. Wijesoma, K.W. Yue, K.L. Chien, T.K. Chow, Online Handwritten Signature Verification for Electronic Commerce over the Internet, WI 2001, LNAI 2198, 2001, pp. 227–236.
4. B. Struif, Use of biometrics for user verification in electronic signature smartcards, E-smart 2001, Lecture Notes in Computer Science, Vol. 2140, Springer, Berlin, 2001, pp. 220–227.
5. On-line and off-line handwriting recognition;Plamondon;IEEE Trans. on Pattern Anal. Mach. Intel.,2000