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Submitted on: 15 July 2021.
Revised on: 08 August 2021.
Accepted on: 21 August 2021.
___________________Electronic Commerce Research and Applications
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Submitted on: 01 December 2002.
Revised on: 14 January 2003.
Accepted on: 14 February 2003.
___________________Electronic Commerce Research and Applications
Submitted on: 11 March 2011.
Revised on: 13 June 2011.
Accepted on: 15 July 2011.
___________________Electronic Commerce Research and Applications
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Submitted on: 06 June 2007.
Revised on: 25 July 2007.
Accepted on: 19 September 2007.
___________________Electronic Commerce Research and Applications
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