1. School of Mathematical Sciences, Universiti Sains Malaysia, Minden, Malaysia
2. Department of Mathematics, Sukkur IBA University, Sukkur, Pakistan
3. Pusat PERMATA@Pintar Negara, Universiti Kebangsaan Malaysia, Bangi, Malaysia
4. Department of Mathematics, International University of Business Agriculture and Technology, Dhaka, Bangladesh
5. School of Science, Monash University, Bandar Sunway, Malaysia