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Submitted on: 14 January 2011.
Revised on: 21 March 2011.
Accepted on: 15 April 2011.
___________________CONNECTION SCIENCE---TAYLOR & FRANCIS LTD
Submitted on: 31 December 2006.
Revised on: 13 March 2007.
Accepted on: 24 March 2007.
___________________CONNECTION SCIENCE---TAYLOR & FRANCIS LTD
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Submitted on: 14 April 1998.
Revised on: 04 August 1998.
Accepted on: 26 August 1998.
___________________CONNECTION SCIENCE---TAYLOR & FRANCIS LTD
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