Baierl, S.
Hohenleutner, M.
Kampfrath, T.
Zvezdin, A. K.
Kimel, A. V.
Huber, R.
Mikhaylovskiy, R. V.
Article History
Received: 24 March 2016
Accepted: 12 August 2016
First Online: 3 October 2016
Competing interests
: The authors declare no competing financial interests.