1. School of Informatics and Applied Mathematics, Universiti Malaysia, Kuala Nerus, Terengganu, Terengganu, Malaysia
2. Department of Mathematics, College of Sciences and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
3. Department of Mathematics, Faculty of Science, Ajloun National University, Ajloun, Jordan
4. Department of Mathematics, Aswan University, Faculty of Science, Aswan, Egypt