@inproceedings{c7c9930060cc4745b6910fd233fd491d,
title = "Reversible reasoning in ratio situations: Problem conceptualization, strategies and constraints",
keywords = "Reversible reasoning ratio",
author = "Ajay RAMFUL and John Olive",
year = "2009",
language = "English",
isbn = "9789602436561",
volume = "4",
pages = "449--456",
editor = "M Tzekaki and M Kaldrimidou and H Sakonidis",
booktitle = "33rd Conference of the International Group for the Psychology of Mathematics Education",
publisher = "International Group for the Psychology of Mathematics Education",
note = "In Search for Theories in Mathematics Education ; Conference date: 19-07-2009 Through 24-07-2009",
}