@book{Stahlknecht.2002,
  address = {Berlin},
  author = {Stahlknecht, Peter and Hasenkamp, Ulrich},
  edition = {10. überarb. und aktual. Aufl.},
  interhash = {9c41f5bac4aacf8d19a6b53dd9020433},
  intrahash = {c114b47327cb7fdc04dfbc9ad77178e7},
  isbn = {3540419861},
  price = {DM 37.90, sfr 34.50, ffr 143.00, L 13.00, lire 41860.00},
  publisher = {Springer},
  series = {Springer-Lehrbuch},
  title = {Einführung in die Wirtschaftsinformatik},
  year = 2002
}

@book{Stahlknecht.1999,
  address = {Berlin},
  author = {Stahlknecht, Peter and Hasenkamp, Ulrich},
  edition = {9., vollst. überarb. Aufl., 147. - 163. Tsd.},
  interhash = {72a45866e47ab1f87c063f4b87c6dcda},
  intrahash = {733b3e2140cf19db828b6be0c9d03777},
  isbn = {3540657649},
  price = {DM 36.00},
  privnote = {No. 219},
  publisher = {Springer},
  series = {Springer-Lehrbuch},
  title = {Einführung in die Wirtschaftsinformatik},
  url = {http://www.gbv.de/dms/ilmenau/toc/302551050.PDF},
  year = 1999
}