Deng, Heng
Li, Hai-rong
Wang, Fang
Yuan, Chao-xin
Liu, Su
Wang, Peng
Xie, Long-zhen
Sun, Yong-zhe
Chang, Fang-zhi
Funding for this research was provided by:
National Natural Science Foundation of China (61204106)
Provincial Natural Science Foundation of Gansu (1107RJZA090)