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Submitted on: 20 August 2013.
Revised on: 13 November 2013.
Accepted on: 04 December 2013.
___________________JOURNAL OF ENGINEERING MATHEMATICS
Submitted on: 08 January 2011.
Revised on: 20 March 2011.
Accepted on: 08 May 2011.
___________________JOURNAL OF ENGINEERING MATHEMATICS
Submitted on: 11 July 2016.
Revised on: 10 August 2016.
Accepted on: 29 September 2016.
___________________JOURNAL OF ENGINEERING MATHEMATICS
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Submitted on: 16 October 2001.
Revised on: 15 January 2002.
Accepted on: 09 March 2002.
___________________JOURNAL OF ENGINEERING MATHEMATICS