1. Department of Mathematics, City University of Science and Information Technology, Peshawar, Pakistan
2. Department of Mathematical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM Bangi 43600, Selangor, Malaysia
3. Department of Mathematics and Social Sciences, Sukkur IBA University, Sukkur 65200, Sindh, Pakistan
4. Department of Mathematical Sciences, Federal Urdu University of Arts, Science & Technology, Gulshan-e-Iqbal, Karachi-75300, Pakistan
5. Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
6. Fakulti Teknologi Kejuruteraan Mekanikal dan Pembuatan, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia
7. Department of Mathematics, Babes-Bolyai University, Cluj-Napoca 400084, Romania