The Journal of King Mongkut's University of Technology North Bangkok
วารสารวิชาการพระจอมเกล้าพระนครเหนือ

Kanittha Yimnak
Department of Mathematics and Computer Science, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Pathum Thani
Thailand

Kannika Yimnak
School of Science and Technology, Sukhothai Thammathirat Open University, Nonthaburi
Thailand