Shi, Lei
Rohringer, Philip
Suenaga, Kazu http://orcid.org/0000-0002-6107-1123
Niimi, Yoshiko
Kotakoski, Jani http://orcid.org/0000-0002-1301-5266
Meyer, Jannik C.
Peterlik, Herwig
Wanko, Marius
Cahangirov, Seymur
Rubio, Angel
Lapin, Zachary J.
Novotny, Lukas
Ayala, Paola
Pichler, Thomas http://orcid.org/0000-0001-5377-9896
Article History
Received: 25 September 2014
Accepted: 2 March 2016
First Online: 4 April 2016
Competing interests
: The authors declare no competing financial interests.