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Submitted on: 26 January 2000.
Revised on: 20 April 2000.
Accepted on: 05 June 2000.
___________________Journal of Macromolecular Science Part A-Pure and Applied Chemistry
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Submitted on: 09 August 2013.
Revised on: 25 November 2013.
Accepted on: 08 December 2013.
___________________Journal of Macromolecular Science Part A-Pure and Applied Chemistry
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Submitted on: 22 October 2003.
Revised on: 26 November 2003.
Accepted on: 22 December 2003.
___________________Journal of Macromolecular Science Part A-Pure and Applied Chemistry