1. School of Mathematical Sciences, Universiti Sains Malaysia, Penang, Malaysia
2. LUNAM Université, Université de Nantes & IRCCyN UMR CNRS, Nantes, France
3. Faculty of Argo-based Industry, Universiti Malaysia Kelantan, Jeli Campus, Kelantan, Malaysia
4. Department of Physical and Mathematical Science, Faculty of Science, Universiti Tunku Abdul Rahman, Jalan Universiti, Perak, Malaysia
5. Department of Business Administration, University of Piraeus, Piraeus, Greece