Language: English
Page range: 78 - 80
Submitted on: Jan 25, 2017
Accepted on: Feb 6, 2017
Published on: Jun 1, 2017
Published by: Latvian Academy of Sciences
In partnership with: Paradigm Publishing Services
Publication frequency: 6 issues per year
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© 2017 David Arney, Peep Piirsalu, published by Latvian Academy of Sciences
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.