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