Pornprakun, Wisanlaya
Sungnul, Surattana http://orcid.org/0000-0003-2984-4621
Kiataramkul, Chanakarn
Moore, Elvin J.
Funding for this research was provided by:
Centre of Excellence in Mathematics,Thailand
King Mongkut's University of Technology North Bangkok (KMUTNB-60-GOV-071)
Article History
Received: 4 February 2019
Accepted: 13 June 2019
First Online: 28 June 2019
Competing interests
: The authors declare that they have no competing interests.