1. College of Civil Engineering, National University of Sciences and Technology, Islamabad, Pakistan
2. College of Engineering, Prince Mohammad Bin Fahd University, Al Khobar, Kingdom of Saudi Arabia
3. Department of Mathematics, Capital University of Science and Technology (CUST), Islamabad, Pakistan
4. Department of Mathematics, Lahore College for Women University, Lahore, Pakistan
5. Department of Mathematics, Centre for Defence Foundation Studies, Universiti Pertahanan Nasional Malaysiagai Besi, Kuala Lumpur, Malaysia