1. Department of Humanities and Sciences, Bheema Institute of Technology and Science, Adoni, Kurnool Dist, 518301, A.P., India
2. Department of Basic Science and Humanities (Mathematics), Narasaraopeta Engineering College, Narasaraopeta, 522601, A.P., India
3. Department of Humanities and Sciences, K.S.R.M College of Engineering, Kadapa, 516003, A.P., India
4. Department of Mathematics, Siddharth Institute of Engineering & Technology, Puttur, 517583, A.P., India