1. Department of Applied Mathematics with Oceanology and Computer Programming, Vidyasagar University, Midnapore, West Bengal, India
2. New Integrated Govt. School, Bhulageria, Jhargram West Bengal, India
3. Department of Econometrics, Faculty of Informatics and Statistics, Prague University of Economics and Business, Prague, Czech Republic
4. Faculty of Engineering Management, Poznan University of Technology, Poznan, Poland
5. IAM, METU, Ankara, Turkey