1. Department of Mathematics, Sardar Bahadur Khan Women's University, Quetta, Pakistan
2. Department of Mathematical Sciences, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Johor, Malaysia
3. Institute of Computer Sciences and Information Technology, The University of Agriculture, Peshawar, Pakistan
4. Faculty of Computer and Mathematical Sciences, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia