Teppe, F.
Marcinkiewicz, M.
Krishtopenko, S. S.
Ruffenach, S.
Consejo, C.
Kadykov, A. M.
Desrat, W.
But, D.
Knap, W.
Ludwig, J.
Moon, S.
Smirnov, D.
Orlita, M.
Jiang, Z.
Morozov, S. V.
Gavrilenko, V.I.
Mikhailov, N. N.
Dvoretskii, S. A.
Article History
Received: 15 March 2016
Accepted: 14 July 2016
First Online: 30 August 2016
Competing interests
: The authors declare no competing financial interests.