Cai, Jian-Feng
Liu, Haixia
Wang, Yang
Funding for this research was provided by:
HKRGC (16300616, 16306415)
National Science Foundation grant (DMS-1043032)
AFOSR grant (FA9550-12-1-0455)
Article History
Received: 28 October 2017
Revised: 18 September 2018
Accepted: 12 October 2018
First Online: 22 October 2018