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Submitted on: 14 September 2012.
Revised on: 04 December 2012.
Accepted on: 01 January 2013.
___________________ANNALS OF SCIENCE---TAYLOR & FRANCIS LTD
Submitted on: 24 April 2005.
Revised on: 04 August 2005.
Accepted on: 14 September 2005.
___________________ANNALS OF SCIENCE---TAYLOR & FRANCIS LTD
Submitted on: 25 November 2009.
Revised on: 16 January 2010.
Accepted on: 14 March 2010.
___________________ANNALS OF SCIENCE---TAYLOR & FRANCIS LTD
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Submitted on: 14 June 2002.
Revised on: 04 September 2002.
Accepted on: 18 October 2002.
___________________ANNALS OF SCIENCE---TAYLOR & FRANCIS LTD
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