Zhao, Qiuping
Ma, Qin
Pan, Fuping
Wang, Zhengmin
Yang, Baoping
Zhang, Jianqiang
Zhang, Junyan
Funding for this research was provided by:
University Scientific Research Project of Gansu Province Foundation of China (2014A-034)
National Natural Science Foundation of China (CN) (21364004)
Gansu Province University Fundamental (HG20140915)