Download Article
Download the full article as a PDF file.
Download the full article as a PDF file.
© 2017 Irina Konopatskaia, Valeriya Vavilova, Alexandr Blinov, Nikolay P. Goncharov, published by Latvian Academy of Sciences
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.