Sun, Shouwen
Jing, Xiaobo
Wang, Qi
Funding for this research was provided by:
National Natural Science Foundation of China (11571032, 91630207)
National Natural Science Foundation of China (NSAF-U1530401)
National Science Foundation (DMS-1517347, DMS-1815921)
National Science Foundation (OIA-1655740,)
Article History
Received: 14 August 2018
Revised: 20 October 2018
Accepted: 26 October 2018
First Online: 2 November 2018