1. Department of Mathematics, King Saud University, Riyadh, Saudi Arabia
2. Department of Administration, Faculty of Economic and Administrative Sciences, Muş Alparslan University, Muş, Turkey
3. Department of Mathematics and Computer Sciences, Cankaya University, Ankara, Turkey
4. Institute of Space Sciences, Măgurele, Romania
5. Department of Mathematics, Faculty of Science, Firat University, Elazığ, Turkey