Authors
Dimitar Vasilev
Konstantin Preslavski University of Shumen, Faculty of Natural Sciences, Shumen, Bulgaria
Turhan Tahir
Konstantin Preslavski University of Shumen, Faculty of Natural Sciences, Shumen, Bulgaria
© 2024 Dimitar Vasilev, Turhan Tahir, published by Konstantin Preslavski University of Shumen
This work is licensed under the Creative Commons Attribution 3.0 License.