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Submitted on: 18 August 2000.
Revised on: 25 September 2000.
Accepted on: 01 November 2000.
___________________International Journal of Acoustics and Vibration
Submitted on: 02 July 2015.
Revised on: 09 August 2015.
Accepted on: 07 September 2015.
___________________International Journal of Acoustics and Vibration
Submitted on: 06 November 2011.
Revised on: 31 January 2012.
Accepted on: 11 February 2012.
___________________International Journal of Acoustics and Vibration
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