@book { ArthurSchnitzlersLeutnantGustl,
    title = "Arthur Schnitzlers Leutnant Gustl",
    author = "Johannes {Schmitz}",
    year = "2017",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/375917"
}