1. Faculty of Science, Ain Shams University, Cairo, Egypt
2. Department of Mathematics and Statistics, College of Science, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
3. Department of Applied Mathematics, National Research Centre, Cairo, Egypt
4. Department of Computational Mathematics and Computer Science, Institute of Natural Sciences and Mathematics, Ural Federal University, Yekaterinburg, Russia
5. Department of Mathematics, Faculty of Science, Benha University, Benha, Egypt