@article{discovery1541156,
            note = {This is an Accepted Manuscript of an article published by Taylor \& Francis in the Research in Mathematics Education on 22 July 2009, available online: http://www.tandfonline.com/10.1080/14794800903063398.},
           month = {September},
           pages = {187--188},
         journal = {Research in Mathematics Education},
          volume = {11},
            year = {2009},
           title = {Dynamic geometry software: the teacher's role in facilitating instrumental genesis},
          number = {2},
            issn = {1754-0178},
             url = {http://dx.doi.org/10.1080/14794800903063398},
          author = {Bretscher, N}
}