1. Department of Mathematics, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand
2. Department of Mathematics, Sri Vasavi College, Erode 638136, India
3. Department of Mathematics and Centre for Research and Development, KPR Institute of Engineering and Technology, Coimbatore, Tamil Nadu 641407, India
4. Mathematics Department, Faculty of Science and Technology, Suan Dusit University, Bangkok 10300, Thailand