@book { MillionengraboderErfolgsstory,
    title = "Millionengrab oder Erfolgsstory",
    author = "Thomas {Wriede}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836643252",
    url = "https://m.diplom.de/document/227627"
}