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Kortenkamp, U., & Rolka K.  (2009).\'a0\'a0Using Technology in the Teaching and Learning of Box Plots.  (Durand-Guerrier, V., Soury-Lavergne S., & Arzarello F., Ed.).\ul Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France). \ul0  \par \par }