DOI: https://doi.org/10.1515/prolas-2017-0028 | Journal eISSN: 2255-890X (formerly 1407-009X) | Journal ISSN: 1407-009X
Language: English
Page range: 166 - 172
Submitted on: Sep 21, 2016
Accepted on: May 31, 2017
Published on: Aug 5, 2017
Published by: Latvian Academy of Sciences
In partnership with: Paradigm Publishing Services
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© 2017 Ilze Grāvīte, Edīte Kaufmane, published by Latvian Academy of Sciences
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.