@book{Sneed.2005,
  address = {Heidelberg},
  author = {Sneed, Harry M. and Hasitschka, Martin and Teichmann, Maria-Therese},
  edition = {1. Aufl.},
  interhash = {e7b59ac8c805fa155b1ecb784a5293a0},
  intrahash = {755a91c74948b4cd8198ce0db98b6704},
  isbn = {3898642747},
  price = {ca. EUR 34.00, ca. EUR AT 35.00, ca. CHF 59.00},
  publisher = {dpunkt.verl.},
  title = {Software-Produktmanagement:  Wartung und Weiterentwicklung bestehender Anwendungssysteme},
  year = 2005
}

@book{Liebstuckel.2006,
  address = {Heidelberg},
  author = {Liebstückel, Karl and Meinhardt, Stefan},
  interhash = {a4eaa4ef6994825d98102a60fe3ff1ce},
  intrahash = {018527ce9215e07ea8802214f45ac28e},
  isbn = {3898643816},
  price = {ca. EUR 23.50, ca. EUR 24.20 (AT)},
  publisher = {dpunkt},
  series = {HMD - Praxis der Wirtschaftsinformatik},
  title = {Product Lifecycle Management},
  url = {http://deposit.ddb.de/cgi-bin/dokserv?id=2798590&prov=M&dok_var=1&dok_ext=htm},
  volume = {43.2006,249},
  year = 2006
}