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Publicado en línea: 07 dic 2021
Páginas: 3 - 23
Recibido: 23 mar 2021
Aceptado: 23 jul 2021
DOI: https://doi.org/10.2478/cait-2021-0027
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© 2021 Gloria Hristova, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Hristova, Gloria
Department of Statistics and Econometrics, Faculty of Economics and Business Administration, Sofia University “St. Kliment Ohridski”Sofia, Bulgaria