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Submitted on: 21 March 2017.
Revised on: 14 May 2017.
Accepted on: 25 June 2017.
___________________CHEMICAL AND PETROLEUM ENGINEERING
Submitted on: 25 January 2004.
Revised on: 02 May 2004.
Accepted on: 06 June 2004.
___________________CHEMICAL AND PETROLEUM ENGINEERING
Submitted on: 19 July 2001.
Revised on: 25 October 2001.
Accepted on: 14 November 2001.
___________________CHEMICAL AND PETROLEUM ENGINEERING
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Submitted on: 09 December 2000.
Revised on: 14 February 2001.
Accepted on: 26 February 2001.
___________________CHEMICAL AND PETROLEUM ENGINEERING