1. Department of Mathematics, Sri Sairam Institute of Technology, Chennai, India
2. Department of Mathematics, Ramakrishna Mission Vivekananda College, Chennai, India
3. Department of Applied Mathematics, Institute of Science and Humanities, Saveetha School of Engineering, Chennai, India
4. FB 4 - Informatik, Universität Trier, Trier, Germany
5. Department of Mathematics, Madras Christian College, Chennai, India
6. School of Mathematics, Computer Science and Engineering, Liverpool Hope University, Liverpool, UK