@incollection{UBHD-68103288,
  author={Duwe, Claudia and G{\"u}nther, Werner and Heldt, Hartmuth and Kirchner, Klaus},
  title={Heidelberg University: pioneers in internet and e-mail use},
  year={2012},
  pages={220-221},
  language={eng},
  isbn={978-3-9811463-4-9},
  booktitle={Wissenschaftsatlas of Heidelberg University},
  editor={Meusburger, Peter},
}
@incollection{UBHD-68103289,
  author={Duwe, Claudia and G{\"u}nther, Werner and Heldt, Hartmuth and Kirchner, Klaus},
  title={Die Universit{\"a}t Heidelberg: Vorreiter im Einsatz von Internet und E-Mail},
  year={2011},
  pages={220-221},
  language={ger},
  isbn={978-3-9811463-4-9 and 978-3-9811463-3-2},
  booktitle={Wissenschaftsatlas der Universit{\"a}t Heidelberg},
  editor={Meusburger, Peter and Schuch, Thomas},
}