Oveshnikov, L. N.
Kulbachinskii, V. A.
Davydov, A. B.
Aronzon, B. A.
Rozhansky, I. V.
Averkiev, N. S.
Kugel, K. I.
Tripathi, V.
Article History
Received: 25 August 2015
Accepted: 15 October 2015
First Online: 24 November 2015
Competing interests
: The authors declare no competing financial interests.