@inbook {RicKor-GDG-2001,
	title = {Grundlagen Dynamischer Geometrie},
	booktitle = {Zeichnung {\textendash} Figur {\textendash} Zugfigur},
	year = {2001},
	pages = {123{\textendash}144},
	publisher = {Franzbecker},
	organization = {Franzbecker},
	address = {Hildesheim, Berlin},
	abstract = {<p>
	In this article we present fundamental definitions that can be used to introduce a mathematical model for dynamic geometry. Starting from reasonable expectations that such a model should meet we will formalize the terms (dynamic) construction, instance of a construction and Dynamic-Geometry-System (DGS). The behavior of a DGS will be described by the terms conservatism and continuity. One of the main results of this article is that we can find a continuous DGS for any construction Z that is built up using algebraic basic construction steps only.</p>
},
	keywords = {refereed},
	url = {http://kortenkamps.net/papers/2001/DG_OW1.pdf},
	author = {Richter-Gebert, J{\"u}rgen and Kortenkamp, Ulrich},
	editor = {Henn, Hans-Wolfgang and Elschenbroich, Hans-J{\"u}rgen and Gawlick, Thomas}
}
@conference {KorRic-GEI-1998,
	title = {Geometry and education in the {I}nternet age},
	booktitle = {Ed-Media \& Ed-Telecom 98. Proceedings of the Tenth World Conference on Educational Multimedia and Hypermedia \& World Conference on Educational Telecommunications, Freiburg, Germany, June 20-25, 1998},
	year = {1998},
	publisher = {AACE},
	organization = {AACE},
	address = {Charlottesville},
	abstract = {<p>
	Interactive Geometry is a major tool in modern geometry education and various software tools are available. We discuss the requirements of such tools and how they can be fulfilled. We also explain how a geometry tool can benefit from the Internet and present Cinderella{\textquoteright}s Caf{\'e}, which is an internet-aware geometry tool with a high mathematical background.</p>
},
	keywords = {refereed},
	url = {http://www.cinderella.de/papers/geo-i.pdf.gz},
	author = {Kortenkamp, Ulrich H. and Richter-Gebert, J{\"u}rgen},
	editor = {Ottmann, Thomas and Tomek, Ivan}
}
@booklet {RicKor-GEI-1997,
	title = {Geometry and education in the {I}nternet age},
	year = {1997},
	publisher = {ETH Z{\"u}rich},
	type = {Gr{\"u}ne Berichte},
	keywords = {invited},
	author = {Richter-Gebert, J{\"u}rgen and Kortenkamp, Ulrich}
}
