1. College of Foreign Studies, Shandong Technology and Business University, Yantai, P.R. China
2. Department of Mathematics, Lahore College Women University, Pakistan
3. Department of Mathematics, Capital University of Science and Technology (CUST), Islamabad, Pakistan
4. Mathematics in Applied Sciences and Engineering Research Group, Scientific Research Center, Al-Ayen University, Nasiriyah, Iraq
5. Department of Mathematics, Faculty of Science, Islamic University of Madinah, Saudi Arabia
6. Department of Mathematics, Turabah University College, Taif University, Saudi Arabia