Submitted on: 07 February 2004.
Revised on: 23 April 2004.
Accepted on: 06 May 2004.
___________________Amfiteatru Economic---EDITURA ASE
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Submitted on: 16 May 2015.
Revised on: 02 August 2015.
Accepted on: 12 September 2015.
___________________Amfiteatru Economic---EDITURA ASE
http://reply.papertrans.cn/1/16/1502/1502-34.png
http://reply.papertrans.cn/1/16/1502/1502-35.png
Submitted on: 04 May 2020.
Revised on: 04 July 2020.
Accepted on: 02 September 2020.
___________________Amfiteatru Economic---EDITURA ASE