Steffens, A.
Friesdorf, M.
Langen, T.
Rauer, B.
Schweigler, T. https://orcid.org/0000-0002-8447-2683
Hübener, R.
Schmiedmayer, J.
Riofrío, C.A.
Eisert, J.
Article History
Received: 29 October 2014
Accepted: 22 May 2015
First Online: 3 July 2015
Competing interests
: The authors declare no competing financial interests.