Lin, Yu-Chu
Wang, Haitao
Wu, Kung-Chien
Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (105-2115-M-006-002, 104-2628-M-006-003-MY4)
Mathematics Division, National Center for Theoretical Sciences
Article History
Received: 8 December 2017
Accepted: 16 April 2018
First Online: 23 April 2018