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Submitted on: 14 March 2004.
Revised on: 15 April 2004.
Accepted on: 28 April 2004.
___________________BIOPOLYMERS---WILEY
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Submitted on: 06 August 1999.
Revised on: 27 September 1999.
Accepted on: 22 November 1999.
___________________BIOPOLYMERS---WILEY
Submitted on: 12 July 2003.
Revised on: 14 August 2003.
Accepted on: 01 September 2003.
___________________BIOPOLYMERS---WILEY
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