@book{Hansen.2005,
  address = {Stuttgart},
  author = {Hansen, Hans Robert and Neumann, Gustaf},
  interhash = {a8a71ce7e522123a2ab4f48db76df59d},
  intrahash = {b6d2cdadc95ae26923f18fa8b4d61d31},
  isbn = {3825226697 9783825226695 3828202918 9783828202917 3825226700 9783825226701 382820290X 9783828202900},
  privnote = {ISBN = {3825226700} ITeG_233 330},
  publisher = {Lucius & Lucius},
  refid = {611471738},
  title = {Wirtschaftsinformatik},
  url = {http://www.worldcat.org/search?qt=worldcat_org_all&q=3825226700},
  year = 2005
}

@book{Hansen.2007,
  address = {Stuttgart},
  author = {Hansen, Robert Hans and Neumann, Gustaf},
  edition = {7., völlig neubearb. und stark erw. Aufl.},
  interhash = {d336e5673f1d03a75ec77ea11043f22c},
  intrahash = {fc4202869481402d4a1aac5390f4f575},
  isbn = {3825212815},
  privnote = {Nr.113},
  publisher = {Lucius & Lucius},
  series = {Wirtschaftsinformatik},
  title = {IT-Lexikon, Aufgaben und Lösungen},
  volume = {1/2, Arbeitsbuch},
  year = 2007
}