Submitted on: 28 August 1999.
Revised on: 03 October 1999.
Accepted on: 28 November 1999.
___________________Cleaner Environmental Systems---ELSEVIER
Submitted on: 04 June 2006.
Revised on: 01 September 2006.
Accepted on: 21 September 2006.
___________________Cleaner Environmental Systems---ELSEVIER
Submitted on: 06 December 2006.
Revised on: 09 March 2007.
Accepted on: 27 March 2007.
___________________Cleaner Environmental Systems---ELSEVIER
Submitted on: 07 September 2008.
Revised on: 06 December 2008.
Accepted on: 17 December 2008.
___________________Cleaner Environmental Systems---ELSEVIER
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Submitted on: 13 February 2001.
Revised on: 12 April 2001.
Accepted on: 15 May 2001.
___________________Cleaner Environmental Systems---ELSEVIER
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Submitted on: 22 November 2024.
Revised on: 19 March 2025.
Accepted on: 08 April 2025.
___________________Cleaner Environmental Systems---ELSEVIER