O artykule
Data publikacji: 12 lip 2021
Zakres stron: 176 - 179
DOI: https://doi.org/10.2478/kbo-2021-0069
Słowa kluczowe
© 2021 Reneta Nikolova et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Nikolova, Reneta
“Neofit Rilski” South-West UniversityBlagoevgrad, Bulgaria
Yankov, Alexander
“Neofit Rilski” South-West UniversityBlagoevgrad, Bulgaria