@inbook {735,
	title = {Der Computer als {\"U}bungs- und Wiederholungsmedium im Mathematikunterricht - eine unterrichtliche Erprobung},
	booktitle = {Entdecken und {\"U}ben mit dem Computer},
	series = {Ausgew{\"a}hlte Unterrichtskonzepte in unterrichtlicher Erpobung},
	volume = {1},
	year = {2006},
	pages = {117-156},
	publisher = {Franzbecker},
	organization = {Franzbecker},
	edition = {Schw{\"a}bisch Gm{\"u}nder mathematikdidaktische Reihe},
	address = {Hildesheim, Berlin},
	author = {Beckmann, Astrid and Hole, Volker and Kittel, Andreas and Ladel, Silke},
	editor = {Beckmann, Astrid}
}
@article {733,
	title = {The Computers as "an exercise and repetition" medium in mathematics lessons: Educational Effectiveness of Tablet PCs},
	journal = {ZDM Mathematics Education},
	volume = {37},
	year = {2005},
	month = {Oktober},
	pages = {379-394},
	author = {Kittel, Andreas and Beckmann, Astrid and Hole, Volker and Ladel, Silke}
}
@inbook {732,
	title = {Tablet-PCs im Mathematikunterricht - eine unterrichtliche Erprobung},
	booktitle = {Beitr{\"a}ge zum Mathematikunterricht 2005 - Beitr{\"a}ge zur 39. Jahrestagung der Gesellschaft f{\"u}r Didaktik der Mathematik vom 28.2. bis 4.3.2005 in Bielefeld},
	year = {2005},
	pages = {299-303},
	publisher = {Franzbecker},
	organization = {Franzbecker},
	address = {Hildesheim},
	author = {Kittel, Andreas and Hole, Volker and Ladel, Silke and Beckmann, Astrid},
	editor = {Graumann, G{\"u}nter}
}
