@book { Metadatenmanagement,
    title = "Metadatenmanagement",
    author = "Christian {Güthlein}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832445850",
    url = "https://m.diplom.de/document/220201"
}