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Submitted on: 28 February 2003.
Revised on: 07 April 2003.
Accepted on: 05 June 2003.
___________________Eurasian Business Review---SPRINGER HEIDELBERG
Submitted on: 17 November 2000.
Revised on: 24 December 2000.
Accepted on: 21 January 2001.
___________________Eurasian Business Review---SPRINGER HEIDELBERG
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Submitted on: 13 April 2019.
Revised on: 22 May 2019.
Accepted on: 01 June 2019.
___________________Eurasian Business Review---SPRINGER HEIDELBERG
Submitted on: 13 July 2021.
Revised on: 30 August 2021.
Accepted on: 24 September 2021.
___________________Eurasian Business Review---SPRINGER HEIDELBERG