1. Department of Mathematics, Faculty of Science, Al-Balqa Applied University, Salt-Jordan
2. Department of Mathematics, Faculty of Science, Yarmouk University, Irbid-Jordan
3. Department of Mathematics, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, Uttar Pradesh, India
4. Department of Mathematics, Faculty of Science, The University of Jordan, Amman-Jordan