@article {KorRic-CGPD-2008,
	title = {Cinderella.2 {\textendash} Geometrie und Physik im Dialog},
	journal = {Computeralgebra-Rundbrief},
	year = {2008},
	keywords = {lehrer},
	url = {http://kortenkamps.net/papers/2008/Rundbrief-CA-Kortenkamp.pdf},
	author = {Kortenkamp, Ulrich and Richter-Gebert, J{\"u}rgen}
}
