Shen, Yanqing
Oganov, Artem R.
Qian, Guangri
Zhang, Jin
Dong, Huafeng
Zhu, Qiang
Zhou, Zhongxiang
Article History
Received: 29 May 2015
Accepted: 20 August 2015
First Online: 16 September 2015
Competing interests
: The authors declare no competing financial interests.