Chen, Xianyao
Tung, Ka-Kit http://orcid.org/0000-0001-8667-7167
Funding for this research was provided by:
National Science Foundation (AGS-1262231, DMS-236 94032)
National Natural Science Foundation of China (41776032, 41521091, U1406401)
Article History
Received: 10 May 2017
Accepted: 16 October 2017
First Online: 28 October 2017