1. Department of Applied Mathematics, Ferdowsi University of Mashhad, Mashhad, Iran
2. Department of Mathematical sciences, University of Agder, Kristiansand, Norway
3. Department of Language, Literature, Mathematics, and Interpreting, Western Norway University of Applied Sciences, Bergen, Norway
4. Faculty of Education, Psychology and Family, Universidad Finis Terrae, Santiago, Chile
5. Center for Advanced Investigations in Education, University of Chile, Santiago, Chile
6. Office of the Assistant Vice-Chancellor (Pasifika), Victoria University of Wellington, Wellington, New Zealand
7. School of Geography, Environment and Earth Sciences, Victoria University of Wellington, Wellington, New Zealand
8. Planning and Management Information, Victoria University of Wellington, Wellington, New Zealand