Sukhodolov, Timofei
Usoskin, Ilya
Rozanov, Eugene
Asvestari, Eleanna
Ball, William T.
Curran, Mark A. J.
Fischer, Hubertus
Kovaltsov, Gennady
Miyake, Fusa
Peter, Thomas
Plummer, Christopher
Schmutz, Werner
Severi, Mirko
Traversi, Rita
Article History
Received: 25 August 2016
Accepted: 23 February 2017
First Online: 28 March 2017
Competing interests
: The authors declare no competing financial interests.