1. Department of Mathematics, COMSATS University Islamabad, Sahiwal, Pakistan
2. Department of Mathematics, University of Engineering and Technology, Lahore, Pakistan
3. Department of Studies and Research in Mathematics, Davanagere University, Davanagere, India
4. Department of Mathematics, Anurag University, Hyderabad, India
5. Department of Mathematics and Statistics, Riphah International University I-14, Islamabad, Pakistan
6. Department of Mechanical Engineering, Lebanese American University, Beirut, Lebanon