Submitted on: 11 August 2012.
Revised on: 01 September 2012.
Accepted on: 15 October 2012.
___________________JOURNAL OF SOUND AND VIBRATION
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Submitted on: 27 May 2004.
Revised on: 25 July 2004.
Accepted on: 08 August 2004.
___________________JOURNAL OF SOUND AND VIBRATION
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Submitted on: 21 January 2006.
Revised on: 28 April 2006.
Accepted on: 01 June 2006.
___________________JOURNAL OF SOUND AND VIBRATION
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