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Submitted on: 19 May 2004.
Revised on: 17 June 2004.
Accepted on: 10 July 2004.
___________________BIOMETRICS---WILEY
Submitted on: 21 May 2001.
Revised on: 29 July 2001.
Accepted on: 18 August 2001.
___________________BIOMETRICS---WILEY
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