Download Article
Download the full article as a PDF file.
Download the full article as a PDF file.
© 2025 Silvia Tsanova-Savova, Slaveyka Paneva-Dimitrova, Liyana Simeonova, Ivelina Lulcheva, Petya Koleva, published by Turiba University Ltd
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.