Download the full article as a PDF file.
© 2015 Solveiga Jekabsone, Tatjana Bogdanova, Arnis Abolins, Andrejs Vanags, Janis Gardovskis, Ilze Strumfa, published by Riga Stradins University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.