Authors
Irina Voronova
Riga Technical University,, Riga, Latvia
Gaida Pettere
Technical University,, Riga, Latvia
© 2018 Ilze Zariņa, Irina Voronova, Gaida Pettere, published by Riga Technical University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.