@book{Magnus.2001,
  address = {Wiesbaden},
  author = {Magnus, Stephan},
  edition = {1. Aufl.},
  interhash = {63ada48daab9a2c4382772fec5b9061d},
  intrahash = {ef1356a296e42d141eb7df91ed8d0a21},
  isbn = {3409117695},
  price = {DM 74.00},
  publisher = {Gabler},
  title = {E-Learning:  Die Zukunft des digitalen Lernens im Betrieb},
  url = {http://www.gbv.de/du/services/toc/bs/328106941},
  year = 2001
}

@book{Apel.2003,
  address = {Bielefeld},
  author = {Apel, Heino},
  interhash = {068ceb43fed293b8641052a82b5c4815},
  intrahash = {979d7ba3577f072e98304b6e29ac1a9e},
  isbn = {3763918655},
  publisher = {Bertelsmann},
  title = {Online lehren:  Planung und Gestaltung netzbasierter Weiterbildung},
  year = 2003
}