1. Department of Mathematics, K. S. Rangasamy College of Technology, Tiruchengode, Tamil Nadu, India
2. Department of Mathematics, Kongu Engineering College, Erode, Tamil Nadu, India
3. Department of Mathematical Sciences, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
4. Faculty of Engineering, Kuwait College of Science and Technology, Doha