1. Department of Mathematics Sikkim Manipal Institute of Technology Sikkim Manipal University Majitar Rangpo, East Sikkim India
2. Physics and Applied Mathematics Unit Indian Statistical Institute Kolkata West Bengal India
3. Department of Electronics and Communication Engineering National Institute of Technology Durgapur Durgapur West Bengal India
4. Faculty of Pharmaceutical Sciences Tokyo University of Science Noda Chiba Japan
5. Department of Mathematics National Institute of Technology Durgapur Durgapur West Bengal India