Authors
Oksana Ivanova
Riga Technical University, Riga, Latvia
Marite Kravale-Paulina
Daugavpils University, Daugavpils, Latvia
© 2021 Maritana Gorina, Oksana Ivanova, Marite Kravale-Paulina, published by Daugavpils University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.