Submitted on: 07 July 1999.
Revised on: 26 September 1999.
Accepted on: 17 October 1999.
___________________International Journal of Minerals Metallurgy and Materials
Submitted on: 30 January 2010.
Revised on: 13 May 2010.
Accepted on: 05 June 2010.
___________________International Journal of Minerals Metallurgy and Materials
Submitted on: 22 February 2002.
Revised on: 07 May 2002.
Accepted on: 26 June 2002.
___________________International Journal of Minerals Metallurgy and Materials
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Submitted on: 30 December 2017.
Revised on: 29 March 2018.
Accepted on: 09 May 2018.
___________________International Journal of Minerals Metallurgy and Materials
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