Myasnikov, Alexander G.
Afonina, Zhanna A.
Ménétret, Jean-François
Shirokov, Vladimir A.
Spirin, Alexander S.
Klaholz, Bruno P.
Article History
Received: 31 July 2014
Accepted: 17 September 2014
First Online: 7 November 2014
Competing interests
: The authors declare no competing financial interests.