Ohfuji, Hiroaki
Irifune, Tetsuo
Litasov, Konstantin D.
Yamashita, Tomoharu
Isobe, Futoshi
Afanasiev, Valentin P.
Pokhilenko, Nikolai P.
Article History
Received: 10 November 2014
Accepted: 7 September 2015
First Online: 1 October 2015
Competing interests
: The authors declare no competing financial interests.