@book { DasMammakarzinom,
    title = "Das Mammakarzinom",
    author = "Janine {Strube}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832475307",
    url = "https://m.diplom.de/document/222811"
}