Zang, Duyang
Li, Lin
Di, Wenli
Zhang, Zehui
Ding, Changlin
Chen, Zhen
Shen, Wei
Binks, Bernard P.
Geng, Xingguo
Funding for this research was provided by:
the Shaanxi Provincial Natural Science Foundation
Article History
Received: 16 March 2018
Accepted: 6 August 2018
First Online: 11 September 2018
Competing interests
: The authors declare no competing interests.