@inbook{b975b026e3144f4f8ec8f7a1a1022113,
title = "The role of external representations in learning combinatorics and probability theory.",
author = "Kolloffel, \{Bas Jan\} and Eysink, \{Tessa H.S.\} and \{de Jong\}, Ton",
year = "2010",
doi = "10.4324/9780203847824-16",
language = "English",
pages = "169--190",
editor = "L. Verschaffel and \{de Corte\}, E. and \{de Jong\}, T. and J. Elen",
booktitle = "Use of representations in reasoning and problem solving",
publisher = "Routledge",
address = "United Kingdom",
}