Open Access Statement
Rg is an open access journal, which means that all content is freely available without charge to the user or his/her institution. Users may read, download, copy, distribute, print, search, and link to the full-text articles as well as use them for any lawful purpose without obtaining prior permission from the publisher or author.
At the same time, all Rg articles are published under a Creative Commons License (CC BY-NC-ND 3.0 DE: Attribution-NonCommercial-NoDerivatives), which means that users are free to share (copy and redistribute) the material in any medium or format under the following terms:
Attribution - You must give appropriate credit to the source, provide a link to the license, and indicate whether any changes were made to the material. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
NonCommercial - You may not use the material for commercial purposes.
NoDerivatives - If you remix, transform, or build upon the material, you may not distribute the modified result.
For more information on Creative Commons Licenses see
Each author publishing in Rg holds the copyright and retains the publishing rights of his/her article without restriction.
More about Open Access at the Max Planck Society