1. University Putra Malaysia, Department of Mathematics and Institute for Mathematical Research, UPM Serdang, Selangor, Malaysia
2. Zhejiang University, Department of Mathematics, Hangzhou, China
3. Siirt University, Art and Science Faculty, Department of Mathematics, Siirt, Turkey
4. Shanghai University, Department of Mathematics, Shanghai, China
5. Siirt University, Faculty of Education, Department of Mathematics, Siirt, Turkey
6. Firat University, Science Faculty, Department of Mathematics, Elaziğ, Turkey