1. Department of Mathematics, P N. Autonomous College, Utkal University, Bhubaneswar-752057, Odisha, India
2. Department of Mathematics, Centurian University of Technology and Management, Paralakhemundi, Gajapati-761211, Odisha, India
3. Department of Physics, Radhakrishna Institute of Technology and Engineering, Bhubaneswar-752057, Odisha, India