Submitted on: 13 May 2000.
Revised on: 15 August 2000.
Accepted on: 07 September 2000.
___________________International Journal of Acoustics and Vibration
Submitted on: 20 June 2011.
Revised on: 11 July 2011.
Accepted on: 25 July 2011.
___________________International Journal of Acoustics and Vibration
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Submitted on: 28 April 2012.
Revised on: 22 July 2012.
Accepted on: 10 September 2012.
___________________International Journal of Acoustics and Vibration
Submitted on: 16 April 2009.
Revised on: 14 May 2009.
Accepted on: 28 June 2009.
___________________International Journal of Acoustics and Vibration
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