Authors
Anna Volkova
Tallinn University of Technology, Tallinn, Estonia
Pavel Ruseljuk
Narva, Estonia
Andres Siirde
Tallinn University of Technology, Tallinn, Estonia
© 2020 Kertu Lepiksaar, Anna Volkova, Pavel Ruseljuk, Andres Siirde, published by Riga Technical University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.