@inproceedings{3bc6289fa9b947adbb048f1658033079,
title = "Tool use and functional thinking: An example of a form-function-shift.",
author = "M. Doorman and P. Boon and P. Drijvers and {Gisbergen Van}, S. and K. Gravemeijer and H.C. Reed",
year = "2009",
language = "English",
pages = "449--456",
editor = "M Tzekaki and M Kaldrimidou and H Sakonidis",
booktitle = "Proceedings of the 33rd Conference of the International Group for the Psychology of Mathematics Education",
publisher = "PME",
note = "33rd Conference of the International Group for the Psychology of Mathematics Education ; Conference date: 01-01-2009 Through 01-01-2009",
}