Open Access Erklärung

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,
or use them for any other lawful purpose, without asking
prior permission from the publisher or the author. This is in
accordance with the BOAI definition of open access.