@article{radford02b,
  added-at = {2008-04-27T17:33:33.000+0200},
  author = {Radford, Luis},
  biburl = {https://www.bibsonomy.org/bibtex/21f1924eb74ae3ef32e01f5c4412fc210/yish},
  interhash = {02ed0bd41fa0b00bf74b3742037117e7},
  intrahash = {1f1924eb74ae3ef32e01f5c4412fc210},
  journal = {For the Learning of Mathematics},
  keywords = {cultural frege knowledge learning mathematics meaning mythesis objectification philosophy semiotics social symbols},
  number = 2,
  pages = {14-23},
  timestamp = {2008-04-27T17:33:34.000+0200},
  title = {The seen, the spoken and the written. A semiotic approach to the problem of objectification of mathematical knowledge},
  url = {http://www.laurentienne.ca/NR/rdonlyres/ECC497E1-DF89-485F-A3AD-0C7CDA5FA0BE/0/learning_math_v22n1v2.pdf},
  volume = 22,
  year = 2002
}