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Submitted on: 09 June 2002.
Revised on: 17 September 2002.
Accepted on: 28 October 2002.
___________________Acoustics Australia---SPRINGER SINGAPORE PTE LTD
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Submitted on: 02 June 2008.
Revised on: 16 September 2008.
Accepted on: 14 October 2008.
___________________Acoustics Australia---SPRINGER SINGAPORE PTE LTD
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Submitted on: 14 March 2011.
Revised on: 14 April 2011.
Accepted on: 04 May 2011.
___________________Acoustics Australia---SPRINGER SINGAPORE PTE LTD