Li, Jian
Zhao, Zhihong
Zhang, Yan
Li, Mouji
Luo, Zhengfang
Luo, Liangjie
Funding for this research was provided by:
National Natural Science Foundation of China (CN) (21301141)
Nature Science Foundation of Gansu Province (145RJYA241)
Scientific Research Project of Gansu Province (2014B-020)
National Natural Science Foundation of China (21261021)