1. Department of Physical and Mathematical Science, Faculty of Science; Universiti Tunku Abdul Rahman; Kampar Perak Malaysia
2. School of Mathematical Sciences; Universiti Sains Malaysia; Penang Malaysia
3. School of Mathematical and Computer Sciences; Heriot-Watt University Malaysia; Putrajaya Malaysia
4. Pusat PERMATApintar Negara; Universiti Kebangsaan Malaysia; Selangor Malaysia
5. Université de Nantes & LS2N UMR 6004; Nantes France