Submitted on: 31 October 2017.
Revised on: 05 December 2017.
Accepted on: 12 January 2018.
___________________Information Systems and E-Business Management
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Submitted on: 17 March 2001.
Revised on: 22 April 2001.
Accepted on: 04 June 2001.
___________________Information Systems and E-Business Management
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Submitted on: 15 February 2014.
Revised on: 10 May 2014.
Accepted on: 28 May 2014.
___________________Information Systems and E-Business Management