1. Department of Basic Sciences and Related Studies, Mehran University of Engineering & Technology, Jamshoro 76062, Pakistan
2. Department of Computer Science and Mathematics, Lebanese American University, Beirut P.O. Box 13-5053, Lebanon
3. Instituto Universitario de Matemática Multidisciplinar, Universitat Politècnica de València, 46022 València, Spain
4. Department of Computing and Mathematics Sciences, Cameron University, Lawton, OK 73505, USA
5. Department of Mathematics, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
6. Department of Mathematics, Near East University, 99138 Mersin, Turkey