À propos de cet article
Publié en ligne: 31 mars 2020
Pages: 25 - 35
Reçu: 10 août 2019
Accepté: 10 déc. 2019
DOI: https://doi.org/10.1515/mosr-2019-0011
Mots clés
© 2019 Christo Ivanov, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Ivanov, Christo
University of National and World Economy, Marketing and Strategic Planning DepartmentSofia, Bulgaria