Submitted on: 13 February 2007.
Revised on: 11 March 2007.
Accepted on: 21 March 2007.
Studia Universitatis Vasile Goldis Arad Seria Stiinte Economice
Submitted on: 27 May 2006.
Revised on: 17 June 2006.
Accepted on: 09 July 2006.
NULL
Submitted on: 23 May 2015.
Revised on: 02 June 2015.
Accepted on: 27 June 2015.
NULL
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Submitted on: 23 June 2014.
Revised on: 26 July 2014.
Accepted on: 05 August 2014.
NULL
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