Barbin, Evelyne

Universite de Nantes, IREM-Centre Francois Viete, France

Furinghetti, Fulvia

Dipartimento di Matematica dell’Universita di Genova, Genova, Italy

Jankvist, Uffe Thomas

Aarhus University, Department of Education, Denmark

Kjeldsen, Tinne Hoff

Department of Mathematical Sciences, University of Copenhagen. Denmark

Tzanakis, Constantinos

Department of Education, University of Crete, Rethymnon 74100, Greece

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