1. School of Mathematical Sciences; National Institute of Science Education and Research (NISER); Khurda 752050, Odisha India
2. Department of Mathematics; Post Graduate College Ghazipur U. P.−233001; India
3. Department of Mathematics and Statistics; University of Victoria; Victoria British Colombia V8W 3R4 Canada
4. Department of Medical Research; China Medical University Hospital, China Medical University; Taichung 40402 Taiwan Republic of China
5. Department of Mathematics; JECRC University; Jaipur 303905 Rajasthan India