1. Department of Mathematics, JNTUH University College of Engineering Hyderabad, Hyderabad, Telangana, India
2. Department of Mathematics, B V Raju Institute of Technology, Narsapur, Telangana, India
3. Department of Mathematics, GITAM University, Hyderabad, Telangana, India
4. Department of Mathematics, Anurag University, Hyderabad, Telangana, India