Hou, Boru
Ma, Junning
Guo, Xiumei
Ju, Furong
Gao, Junwei
Wang, Dengfeng
Liu, Jixing
Li, Xiaohui
Zhang, Shengxiang
Ren, Haijun
Funding for this research was provided by:
National Natural Science Foundation of Gansu, China (No. 1506RJZA222)
Lanzhou Science and Technology Bureau Project (2015-2-55)