@article{JahnkeWippermann1994,
  author    = {Jahnke, Thomas and Wippermann, Christina},
  title     = {Vern{\"u}nftig bremsen und rechnen! : zehn Aufgaben f{\"u}r Bahn-, Auto- und Radfahrer},
  year      = {1994},
  language  = {de}
}
@article{JahnkeWippermann1994,
  author    = {Jahnke, Thomas and Wippermann, Christina},
  title     = {Weg, Geschwindigkeit und Beschleunigung im Mathematikunterricht},
  year      = {1994},
  language  = {de}
}
@article{LauterBoeltsJahnkeetal.1995,
  author    = {Lauter, Josef and B{\"o}lts, Gabriele and Jahnke, Thomas and Kuypers, Wilhelm and R{\"u}diger, Karlheinz and Wippermann, Christina and Wippermann, Heinrich and Wuttke, Hans},
  title     = {Mathematik Analysis : Gesamtband},
  publisher = {Cornelsen},
  address   = {Berlin},
  pages     = {304 S.},
  year      = {1995},
  language  = {de}
}