Bayraktar, Erhan
Yu, Xiang http://orcid.org/0000-0003-4053-7876
Funding for this research was provided by:
Directorate for Mathematical and Physical Sciences (1613170)
Research Grants Council, University Grants Committee (25302116)
Article History
Received: 2 June 2018
Accepted: 27 August 2018
First Online: 1 September 2018