Yang, Xiaogang
Gong, Yuezheng
Li, Jun
Zhao, Jia
Wang, Qi
Funding for this research was provided by:
National Science Foundation (DMS-1200487, DMS-1517347)
NSF of China (11571032, 91630207)
Article History
Received: 17 March 2017
Accepted: 2 May 2018
First Online: 24 May 2018