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Submitted on: 08 September 2016.
Revised on: 14 October 2016.
Accepted on: 05 November 2016.
___________________Future Business Journal---SPRINGER
Submitted on: 01 June 2016.
Revised on: 14 July 2016.
Accepted on: 11 September 2016.
___________________Future Business Journal---SPRINGER
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Submitted on: 27 January 2003.
Revised on: 18 February 2003.
Accepted on: 21 March 2003.
___________________Future Business Journal---SPRINGER
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Submitted on: 30 January 2020.
Revised on: 05 April 2020.
Accepted on: 23 April 2020.
___________________Future Business Journal---SPRINGER
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