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Submitted on: 12 March 2004.
Revised on: 02 April 2004.
Accepted on: 02 May 2004.
___________________China Foundry---SPRINGER SINGAPORE PTE LTD
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Submitted on: 26 January 2001.
Revised on: 06 March 2001.
Accepted on: 20 March 2001.
___________________China Foundry---SPRINGER SINGAPORE PTE LTD