Commission Internationale de l'Enseignement Mathématique. The 2009, 2011 & 2013 ICMI Awards. Felix Klein and Hans Freudenthal Medals
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Commission Internationale de l'Enseignement Mathématique. The 2009, 2011 & 2013 ICMI Awards. Felix Klein and Hans Freudenthal Medals. Enseign. Math. 59 (2013), no. 3/4, pp. 381–391
DOI 10.4171/LEM/59-3-11