Submitted on: 28 March 2000.
Revised on: 26 April 2000.
Accepted on: 02 June 2000.
___________________Express Polymer Letters---BUDAPEST UNIV TECHNOL & ECON
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Submitted on: 29 November 2014.
Revised on: 14 January 2015.
Accepted on: 03 March 2015.
___________________Express Polymer Letters---BUDAPEST UNIV TECHNOL & ECON
Submitted on: 12 May 2003.
Revised on: 16 July 2003.
Accepted on: 01 September 2003.
___________________Express Polymer Letters---BUDAPEST UNIV TECHNOL & ECON
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Submitted on: 20 June 2006.
Revised on: 15 July 2006.
Accepted on: 03 September 2006.
___________________Express Polymer Letters---BUDAPEST UNIV TECHNOL & ECON
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Submitted on: 10 March 2020.
Revised on: 03 July 2020.
Accepted on: 05 August 2020.
___________________Express Polymer Letters---BUDAPEST UNIV TECHNOL & ECON