Li, Jia
Li, Yue Cong
Zhang, Zhen
Li, Ying
Wang, Chun Yue
Funding for this research was provided by:
the National Natural Science Foundation of China (41472157, 41171166, 41371215)
the Hebei Natural Science Foundation (D2013205038)
the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA05120202)