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Submitted on: 06 June 2008.
Revised on: 13 August 2008.
Accepted on: 03 September 2008.
___________________International Journal of Oil Gas and Coal Technology
Submitted on: 24 January 2012.
Revised on: 23 February 2012.
Accepted on: 08 April 2012.
___________________International Journal of Oil Gas and Coal Technology
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Submitted on: 18 October 2003.
Revised on: 24 December 2003.
Accepted on: 18 February 2004.
___________________International Journal of Oil Gas and Coal Technology
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Submitted on: 19 August 1999.
Revised on: 20 October 1999.
Accepted on: 10 November 1999.
___________________International Journal of Oil Gas and Coal Technology
Submitted on: 04 April 2024.
Revised on: 16 July 2024.
Accepted on: 14 August 2024.
___________________International Journal of Oil Gas and Coal Technology