1. Mathematics Department, Faculty of Science, Tanta University, Tanta, Egypt
2. Mechanical Engineering Department, College of Engineering and Islamic Architecture, Umm Al-Qura University, Makkah, Saudi Arabia
3. Mathematics and Computer Science Department, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt
4. Department of Basic Science, Faculty of Engineering, Horus University, Damietta, Egypt