@book { LeitfadenfrdieEinfhrungvonWissensmanagement,
    title = "Leitfaden für die Einführung von Wissensmanagement",
    author = "Andreas {Langenhan}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836633642",
    url = "https://m.diplom.de/document/227086"
}