G. Browman. JAMA : the journal of the American Medical Association, 286 (12):
1509-1511(September 2001)LR: 20061107; PUBM: Print; JID: 7501160; CON: JAMA. 2001 Sep 26;286(12):1461-7. PMID: 11572738; ppublish.
P. Cobb, und H. Bauersfeld. The Emergence of Mathermatical Meaning: Interactions in Classroom Cultures, Lawrence Erlbaum Associates, Hillside, NJ, (1995)
P. Cobb, E. Yackel, und T. Wood. The Emergence of Mathermatical Meaning: Interactions in Classroom Cultures, Lawrence Erlbaum Associates, Hillside, NJ, (1995)