@inbook {998,
	title = {Audio-Podcasts f{\"u}r Lehre und Forschung - Mathematik m{\"u}ndlich darstellen als Herausforderung},
	booktitle = {Festschrift f{\"u}r Rose Vogel},
	year = {2020},
	pages = {217-227},
	publisher = {Waxmann},
	organization = {Waxmann},
	address = {M{\"u}nster},
	author = {Schreiber, Christof},
	editor = {Vogler, Anna and Huth, Melanie and Fetzer, Marei and Beck, Melanie}
}
@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.}
}
@inbook {960,
	title = {TellMEE - Telling Mathematics in Elementary Education},
	booktitle = {Early Mathematics Learning {\textendash} Selected Papers of the POEM Conference 2016},
	year = {2018},
	pages = {159-177},
	publisher = {Springer},
	organization = {Springer},
	address = {New York},
	author = {Klose, Rebecca and Schreiber, Christof},
	editor = {Benz, Christiane and Steinweg, Anna Susanne and Gasteiger, Hedwig and Vollmuth, Helene and Sch{\"o}ner, Priska and Z{\"o}llner, Johanna}
}
@article {936,
	title = {Digital Platforms for Research Collaboration: Using Design Science in Developing a South African Open Knowledge Repository},
	journal = {Information Technology for Development},
	year = {2017},
	author = {van Biljon, J. and Marais, M. and Platz, Melanie}
}
@conference {937,
	title = {Design of an Open ICT4D Knowledge Repository},
	booktitle = {IST-Africa 2015 Conference Proceedings},
	year = {2015},
	author = {Platz, Melanie and van Biljon, J.}
}
@conference {670,
	title = {Early Mathematics Learning. Selected Papers of the POEM 2012 Conference},
	booktitle = {POEM},
	year = {2014},
	publisher = {Springer},
	organization = {Springer},
	author = {Benz, C. and Brandt, B. and Kortenkamp, U. and Krummheuer, G. and Ladel, S. and Vogel, R.}
}
@book {758,
	title = {Early Mathematics Learning. Selected Papers of the POEM 2012 Conference.},
	year = {2013},
	publisher = {Springer},
	organization = {Springer},
	address = {New York},
	editor = {Kortenkamp, Ulrich and Brandt, Birgit and Benz, Christiane and Krummheuer, G{\"o}tz and Ladel, Silke and Vogel, Rose}
}
@inbook {760,
	title = {Number Concepts - Process of Internalization and Externalization by the Use of Multi-Touch Technology},
	booktitle = {Early Mathematics Learning. Selected Papers of the POEM 2012 Conference.},
	year = {2013},
	pages = {237-253},
	publisher = {Springer},
	organization = {Springer},
	address = {New York},
	author = {Ladel, Silke and Kortenkamp, Ulrich},
	editor = {Kortenkamp, Ulrich and Brandt, Birgit and Benz, Christiane and Krummheuer, G{\"o}tz and Ladel, Silke and Vogel, Rose}
}
@inbook {742,
	title = {Zur Darstellung von Arithmetik bei der Gestaltung von Software f{\"u}r den Anfangsunterricht},
	booktitle = {Beitr{\"a}ge zum Mathematikunterricht 2008 - Beitr{\"a}ge zur 42. Jahrestagung der Gesellschaft f{\"u}r Didaktik der Mathematik vom 13.3. bis 18.3.2007 in Budapest},
	year = {2008},
	pages = {199-203},
	publisher = {WTM-Verlag},
	organization = {WTM-Verlag},
	address = {M{\"u}nster},
	author = {Ladel, Silke},
	editor = {V{\'a}s{\'a}rhelyi, Eva}
}
