He, Fei
Lee, Man-Chun
Funding for this research was provided by:
Division of Mathematical Sciences (DMS-1709894)
National Natural Science Foundation of China (11801474)
Fundamental Research Funds for the Central Universities (20720180007)
Natural Science Foundation of Fujian Province (2019J05011)
Article History
Received: 16 April 2020
Accepted: 8 September 2020
First Online: 21 September 2020