Yu, Jie
Li, Yun
Lu, Quanfang
Zheng, Jidong
Yang, Shuxiu
Jin, Fang
Wang, Qizhao
Yang, Wu
Funding for this research was provided by:
National Natural Science Foundation of China (CN) (21367023, 21567025)
Natural Science Foundation of Gansu Province (CN) (1208RJZA161, 1308RJZA144)
Scientific Research Project in Higher Education Institutions of Gansu Province(CN) (2013-019)
Key Project of Young Teachers' Scientific Research Promotion of Northwest Normal University(CN) (NWNU-LKQN-12-9)