1. Department of Applied Mathematics, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh, India
2. Department of Mathematics and Statistics, Faculty of Science, Integral University, Lucknow, India
3. Department of Economics, Kebri Dehar University, Kebri Dehar, Ethiopia
4. University Centre for Research & Development, University School of Business, Chandigarh University, Gharuan, Mohali, Punjab, India