Open access and licensing

This is an open access journal which means that all content is freely available without charge to the user or his/her institution. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles in this journal without asking prior permission from the publisher or the author. This is in accordance with the BOAI definition of open access. Author(s) of the published papers retain copyright, the papers are made freely available for non-commercial purposes, allowing download, reuse, reprint and distribution of the material as long as the original authors and the source are cited. This license is equivalent to the CC BY-NC-ND.