Commission Internationale de l'Enseignement Mathématique. Discussion Document for the Twenty-First ICMI Study
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Commission Internationale de l'Enseignement Mathématique. Discussion Document for the Twenty-First ICMI Study. Enseign. Math. 56 (2010), no. 1/2, pp. 189–199
DOI 10.4171/LEM/56-1-8