Hanke, Jan-Philipp http://orcid.org/0000-0002-2113-7829
Freimuth, Frank http://orcid.org/0000-0001-6193-5991
Niu, Chengwang
Blügel, Stefan http://orcid.org/0000-0001-9987-4733
Mokrousov, Yuriy http://orcid.org/0000-0003-1072-2421
Article History
Received: 24 April 2017
Accepted: 21 August 2017
First Online: 14 November 2017
Competing interests
: The authors declare no competing financial interests.