@book { ZurRolleundSituationdesHelfersimRettungsdienst,
    title = "Zur Rolle und Situation des Helfers im Rettungsdienst",
    author = "Götz {Barkey}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832464455",
    url = "https://m.diplom.de/document/221869"
}