@inbook{2b238bd6cead4976999910b99571730e,
title = "A hypothetical learning trajectory on measurement and flexible arithmetic",
keywords = "Wiskunde en Informatica (WIIN), Mathematics, Landbouwwetenschappen, Natuurwetenschappen, Wiskunde: algemeen",
author = "K.P.E. Gravemeijer and J. Bowers and M. Stephan",
year = "2003",
language = "Undefined/Unknown",
isbn = "0-87353-556-1",
publisher = "NCTM",
pages = "51--66",
editor = "M. Stephan and J. Bowers and P. Cobb and K.P.E. Gravemeijer",
booktitle = "Supporting students' development of measuring conceptions: Analyzing students' learning in social context. Journal for Research in Mathematics Education Monograph No. 12",
}