Batrakov, K.
Kuzhir, P.
Maksimenko, S.
Paddubskaya, A.
Voronovich, S.
Lambin, Ph
Kaplas, T.
Svirko, Yu
Article History
Received: 3 September 2014
Accepted: 3 November 2014
First Online: 26 November 2014
Competing interests
: The authors declare no competing financial interests.