Ren, Xueguang
Wang, Enliang http://orcid.org/0000-0002-5703-6501
Skitnevskaya, Anna D. http://orcid.org/0000-0002-9328-1598
Trofimov, Alexander B. http://orcid.org/0000-0002-0201-5957
Gokhberg, Kirill
Dorn, Alexander
Article History
Received: 21 November 2017
Accepted: 15 June 2018
First Online: 23 July 2018
Competing interests
: The authors declare no competing interests.