Submitted on: 11 November 2013.
Revised on: 06 February 2014.
Accepted on: 27 February 2014.
___________________European Journal of Management and Business Economics
Submitted on: 14 September 2002.
Revised on: 18 December 2002.
Accepted on: 22 January 2003.
___________________European Journal of Management and Business Economics
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Submitted on: 23 December 2017.
Revised on: 03 March 2018.
Accepted on: 16 March 2018.
___________________European Journal of Management and Business Economics
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Submitted on: 08 November 2012.
Revised on: 09 December 2012.
Accepted on: 26 January 2013.
___________________European Journal of Management and Business Economics
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