@book { DerLagebericht,
    title = "Der Lagebericht",
    author = "Heike {Stöber}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832497330",
    url = "https://m.diplom.de/document/224807"
}