Migunov, Vadim
Ryll, Henning
Zhuge, Xiaodong
Simson, Martin
StrĂ¼der, Lothar
Batenburg, K. Joost
Houben, Lothar
Dunin-Borkowski, Rafal E.
Article History
Received: 24 June 2015
Accepted: 2 September 2015
First Online: 5 October 2015
Competing interests
: The authors declare no competing financial interests.