@conference {746,
	title = {Realisation of MERs (Multiple Extern Representations) and MERLs (Multiple Equivalent Linked Representations) in Elementary Mathematics Software},
	booktitle = {Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France)},
	year = {2009},
	month = {Januar, Februar},
	publisher = {Congress of the European Society for Research in Mathematics Education (CERME)},
	organization = {Congress of the European Society for Research in Mathematics Education (CERME)},
	address = {Lyon, France},
	author = {Ladel, Silke and Kortenkamp, Ulrich},
	editor = {Durand-Guerrier, Viviane and Soury-Lavergne, Sophie and Arzarello, Ferdinando}
}
