1. Department of Mathematics, Clarkson University, Potsdam, NY 13699, USA
2. Department of Computer Science and Mathematics, Lebanese American University, Beirut, Lebanon
3. Department of Computer Engineering, Biruni University, Istanbul, Turkey
4. Department of Mathematics, King Abdul Aziz University, Jeddah, Saudi Arabia
5. Department of Mathematics, Çankaya University, Ankara, Turkey
6. Institute of Space Sciences, Magurele, Bucharest, Romania
7. Lebanese American University, 11022801 Beirut, Lebanon