Chestnov, Igor Yu.
Demirchyan, Sevak S.
Alodjants, Alexander P.
Rubo, Yuri G.
Kavokin, Alexey V.
Article History
Received: 19 August 2015
Accepted: 7 December 2015
First Online: 21 January 2016
Competing interests
: The authors declare no competing financial interests.