J. Matos, Y. Mor, R. Noss, and M. Santos. Fourth Congress of the European Society for Research in Mathematics Education (CERME-4), Sant Feliu de Guíxols, Spain, (2005)
P. Cobb, E. Yackel, and T. Wood. The Emergence of Mathermatical Meaning: Interactions in Classroom Cultures, Lawrence Erlbaum Associates, Hillside, NJ, (1995)
J. Jameson, G. Ferrell, and J. Kelly. British Journal of Educational Technology, 37 (6):
949–968(2006)British Journal of Educational Technology, Volume 37, Number 6, November 2006.
P. Cobb, and H. Bauersfeld. The Emergence of Mathermatical Meaning: Interactions in Classroom Cultures, Lawrence Erlbaum Associates, Hillside, NJ, (1995)