@book { EntwicklungeinesMarknagelsfrdenHumerus,
    title = "Entwicklung eines Marknagels für den Humerus",
    author = "Eric {Bartsch}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/218858"
}