Copyright and Licensing

The authors of the research collection retain copyright and allow the publisher to publish their manuscript as a primary article. All the published articles are licensed under the  Creative Commons «Attribution» 4.0 International (CC BY 4.0), which permits freely copying and sharing the material in any medium or format, edit, transform, and generate derivative  materials for any purposes, including commercial and non-commercial ones. The authors may share and distribute their papers provided a proper mandatory reference is given to the primary publication.