Qu, Wei-Hua
Qu, Guo-Hua
Zhang, Xin-Dong
Yan, Zhi-Jun
Funding for this research was provided by:
National Natural Science Foundation of China (73171113)
Youth Foundation of Shanxi University of Finance and Economics (QN2017-007)
Beijing Natural Science Foundation of China (9152015)
Article History
Received: 28 July 2017
Accepted: 30 March 2018
First Online: 9 April 2018