About this article
Published Online: Jun 13, 2017
Page range: 52 - 60
DOI: https://doi.org/10.1515/acss-2017-0007
Keywords
© Riga Technical University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Strautmane, Maija
Riga Technical University,Riga, Latvia