Tereshina, E. A.
Khmelevskyi, S.
Politova, G.
Kaminskaya, T.
Drulis, H.
Tereshina, I. S.
Article History
Received: 5 November 2015
Accepted: 16 February 2016
First Online: 2 March 2016
Competing interests
: The authors declare no competing financial interests.