1. Department of Mathematics, Faculty of Science and Arts, Düzce University , Düzce , Turkey
2. Department of Mathematics, GC Women University , Sialkot , Pakistan
3. Jiangsu Key Laboratory for NSLSCS, School of Mathematical Sciences, Nanjing Normal University , Nanjing , 210023 , China
4. Department of Mathematics, Huzhou University , Huzhou 313000 , China