Submitted on: 03 April 2013.
Revised on: 30 July 2013.
Accepted on: 26 August 2013.
___________________Economic Computation and Economic Cybernetics Studies and Research
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Submitted on: 09 April 2021.
Revised on: 07 July 2021.
Accepted on: 29 July 2021.
___________________Economic Computation and Economic Cybernetics Studies and Research