Submitted on: 01 June 2002.
Revised on: 08 September 2002.
Accepted on: 06 October 2002.
___________________European Journal of Management and Business Economics
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Submitted on: 29 November 2016.
Revised on: 21 March 2017.
Accepted on: 09 April 2017.
___________________European Journal of Management and Business Economics
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Submitted on: 20 September 2014.
Revised on: 07 November 2014.
Accepted on: 12 December 2014.
___________________European Journal of Management and Business Economics
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Submitted on: 17 November 2018.
Revised on: 16 December 2018.
Accepted on: 27 December 2018.
___________________European Journal of Management and Business Economics
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Submitted on: 24 June 2009.
Revised on: 10 October 2009.
Accepted on: 26 October 2009.
___________________European Journal of Management and Business Economics