@book { LeutnantGustlEineFragederEhre,
    title = "Leutnant Gustl - Eine Frage der Ehre?",
    author = "Marion {Luger}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640429653",
    url = "https://www.hausarbeiten.de/document/134816"
}