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Submitted on: 11 December 2005.
Revised on: 02 March 2006.
Accepted on: 21 March 2006.
___________________European Research on Management and Business Economics
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Submitted on: 15 January 2020.
Revised on: 22 April 2020.
Accepted on: 08 May 2020.
___________________European Research on Management and Business Economics
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Submitted on: 01 March 2004.
Revised on: 22 June 2004.
Accepted on: 03 August 2004.
___________________European Research on Management and Business Economics
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Submitted on: 21 August 2022.
Revised on: 29 September 2022.
Accepted on: 19 October 2022.
___________________European Research on Management and Business Economics