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The articles published in Volumes 26 – 28 (2017-2019) in this journal are available under a licence Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0).

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Articles published since 2020:
Since 2020 all articles published in this journal are available under a licence Attribution 4.0 International (CC BY 4.0). The Authors may self-archive a) the published version of the text and/or b) postprint version (peer-reviewed final electronic version of the publication accepted/approved by the Publisher for publication). 

Articles from Volumes 26 – 28 (2017-2019):
Scientific publications published in Volumes 26 – 28 (2017-2019) of the Journal are licensed under the Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) license, which means that the Works can be copied and redistributed in any medium or format under specific terms. 

Articles published prior to Volume 26 (2017):
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