Submitted on: 12 January 2008.
Revised on: 01 April 2008.
Accepted on: 27 May 2008.
___________________European Journal of Management and Business Economics
Submitted on: 04 January 2005.
Revised on: 05 April 2005.
Accepted on: 13 May 2005.
___________________European Journal of Management and Business Economics
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Submitted on: 27 March 2014.
Revised on: 13 May 2014.
Accepted on: 31 May 2014.
___________________European Journal of Management and Business Economics
Submitted on: 22 January 2012.
Revised on: 13 March 2012.
Accepted on: 01 May 2012.
___________________European Journal of Management and Business Economics
Submitted on: 11 July 2010.
Revised on: 05 November 2010.
Accepted on: 24 December 2010.
___________________European Journal of Management and Business Economics