1. Department of Mathematics, University of Management and Technology, Sialkot Campus, Lahore, Pakistan
2. Department of Natural Sciences and Humanities, University of Engineering and Technology, Lahore, Pakistan
3. Mathematics Department, College of Science, Jouf University, Sakaka, Saudi Arabia
4. Department of Mathematics, Quaid-i-Azam University, Islamabad, Pakistan
5. Mechanical engineering department, College of Engineering, Northern Border University, Arar, Saudi Arabia