1. Department of Mathematics, Narasaraopeta Engineering College, Narasaraopet, India
2. Department of Mathematics, Koneru Lakshmaiah Education Foundation, Guntur, India
3. Department of Mathematics, RVR & JC College of Engineering, Guntur, India
4. Department of Computer Science and Engineering, Vignan’s Nirula Institute of Technology & Science for Women, Guntur, India