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Publicado en línea: 15 jun 2018
Páginas: 711 - 717
DOI: https://doi.org/10.2478/picbe-2018-0063
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© 2018 Bogdan Gabriel Nistoreanu, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Nistoreanu, Bogdan Gabriel
The Bucharest University of Economic Studies,Bucharest, Romania
Nicodim, Liliana
“Ovidius” University,Constanta, Romania
Diaconescu, Dan Mihnea
The Bucharest University of Economic Studies,Bucharest, Romania