Submitted on: 10 June 2015.
Revised on: 13 July 2015.
Accepted on: 26 July 2015.
___________________BJU INTERNATIONAL---WILEY
Submitted on: 29 October 2001.
Revised on: 18 January 2002.
Accepted on: 18 March 2002.
___________________BJU INTERNATIONAL---WILEY
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Submitted on: 21 February 2014.
Revised on: 28 April 2014.
Accepted on: 09 May 2014.
___________________BJU INTERNATIONAL---WILEY
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Submitted on: 03 June 2000.
Revised on: 28 June 2000.
Accepted on: 14 August 2000.
___________________BJU INTERNATIONAL---WILEY
Submitted on: 09 April 2009.
Revised on: 04 June 2009.
Accepted on: 12 July 2009.
___________________BJU INTERNATIONAL---WILEY
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