1. Department of Mathematics and Statistics, Faculty of Applied Sciences and Technology, Universiti Tun Hussein Onn, Malaysia Batu Pahat, Johar, Malaysia
2. Department of Mathematics and Social Sciences, Sukkur IBA University, Sukkur, Pakistan
3. Department of Mathematics, GBCD, Pretabad, Hyderabad, Pakistan
4. Department of Mathematical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM, Bangi, Selangor, Malaysia
5. Department of Computer Science and Mathematics, Lebanese American University, Byblos, Lebanon
6. Mechanical Engineering Department, College of Engineering, King Saud University, Al-Riyadh, Saudi Arabia
7. Department of Mathematics, Babeş-Bolyai University, Cluj-Napoca, Romania