Liu, Qiang
Li, Shuguang
Li, Jianshe
Chen, Hailiang
Fan, Zhenkai
An, Guowen
Li, Hui
Zi, Jianchen
Funding for this research was provided by:
National Natural Science Foundation of China (61178026, 61475134)
Natural Science Foundation of Hebei Province, China (E2012203035)