1. Department of Mathematics, Faculty of Education, Kafkas University, Kars 36100, Turkey
2. Department of Mathematics, Faculty of Science, Erzurum Technical University, Erzurum, Turkey
3. Department of Applied Mathematics, Faculty of Mathematical Science, University of Tabriz, Tabriz 51666-16471, Iran
4. Natural Sciences Faculty, Lankaran State University, 50, H. Aslanov str., Lankaran, Azerbaijan
5. Department of Mathematics, Faculty of Education, Erciyes University, 38039 Melikgazi-Kayseri, Turkey