<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold" style="font-size:10pt">Bakker, Arthur / Michael H. G. Hoffmann</hi><hi xmlns="http://www.tei-c.org/ns/1.0" style="font-size:10pt" xml:space="preserve"> (2005): “Diagrammatic Reasoning as the Basis for Developing Concepts: A Semiotic Analysis of Students’ Learning about Statistical Distribution”, in: </hi><hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic" style="font-size:10pt">Educational Studies in Mathematics</hi><hi xmlns="http://www.tei-c.org/ns/1.0" style="font-size:10pt" xml:space="preserve"> 60, no. 3 (November 2005): 333–58. </hi>