1. Department of Mathematics, Center for Research and Development, KPR Institute of Engineering and Technology, Coimbatore, Tamilnadu, India
2. Department of Mathematics, K.S.R College of Engineering, Tiruchengode, Namakkal, Tamilnadu, India
3. Department of Mathematics, Sri Vasavi College, Erode, Tamilnadu, India
4. Department of Mathematics and Statistics, School of Basic Sciences, Central University of Punjab, VPO-Ghudda, Bathinda, Punjab 151401, India
5. Department of Mathematics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand