Subkhangulov, R. R.
Mikhaylovskiy, R. V.
Zvezdin, A. K.
Kruglyak, V. V.
Rasing, Th.
Kimel, A. V.
Article History
Received: 6 October 2015
Accepted: 16 November 2015
First Online: 4 January 2016
Competing interests
: The authors declare no competing financial interests.