Submitted on: 10 February 2011.
Revised on: 10 April 2011.
Accepted on: 14 May 2011.
___________________Journal of the Pakistan Institute of Chemical Engineers
Submitted on: 06 August 2002.
Revised on: 13 September 2002.
Accepted on: 05 October 2002.
___________________Journal of the Pakistan Institute of Chemical Engineers
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Submitted on: 03 September 2011.
Revised on: 23 December 2011.
Accepted on: 14 February 2012.
___________________Journal of the Pakistan Institute of Chemical Engineers
Submitted on: 12 January 2009.
Revised on: 14 April 2009.
Accepted on: 29 April 2009.
___________________Journal of the Pakistan Institute of Chemical Engineers
Submitted on: 02 October 2002.
Revised on: 28 October 2002.
Accepted on: 05 December 2002.
___________________Journal of the Pakistan Institute of Chemical Engineers
Submitted on: 07 July 2017.
Revised on: 09 September 2017.
Accepted on: 27 September 2017.
___________________Journal of the Pakistan Institute of Chemical Engineers
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Submitted on: 26 October 2012.
Revised on: 01 January 2013.
Accepted on: 18 February 2013.
___________________Journal of the Pakistan Institute of Chemical Engineers
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