@inbook {1007,
	title = {{\textquoteleft}Practicing place value{\textquoteright}: How children interpret and use virtual representations and features},
	booktitle = {Proceedings of the Eleventh Congress of the European Society for Research in Mathematics Education },
	year = {2019},
	pages = {2941-2948},
	publisher = {Freudenthal Group \& Freudenthal Institute, Utrecht University and ERME},
	organization = {Freudenthal Group \& Freudenthal Institute, Utrecht University and ERME},
	address = {Utrecht, the Netherlands},
	author = {Schulz, Axel and Walter, Daniel},
	editor = {Jankvist, U. T. and van den Heuvel-Panhuizen, M. and Veldhuis, M.}
}
