@Book{rh-csidg-00,
author = { Ulrich Kortenkamp and J{\"u}rgen Richter-Gebert },
title = { Cinderella - die interaktive Geometriesoftware },
year = { 2000 },
month = { January },
publisher = { HEUREKA-Klett Softwareverlag },
address = { Stuttgart },
}
