Submitted on: 01 October 2011.
Revised on: 26 October 2011.
Accepted on: 20 November 2011.
___________________IDCases---ELSEVIER SCI LTD
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Submitted on: 19 February 2010.
Revised on: 03 April 2010.
Accepted on: 12 May 2010.
___________________IDCases---ELSEVIER SCI LTD
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Submitted on: 30 July 1999.
Revised on: 29 October 1999.
Accepted on: 20 December 1999.
___________________IDCases---ELSEVIER SCI LTD
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Submitted on: 22 July 2022.
Revised on: 06 September 2022.
Accepted on: 08 October 2022.
___________________IDCases---ELSEVIER SCI LTD