@book { ErsteHilfe,
    title = "Erste Hilfe",
    author = "Romana {Kandioler} and Heinz {Kuderna} and Gabriele {Sprengseis}",
    year = "2018",
    publisher = "facultas",
    address = "Wien, Österreich",
    url = "https://campus-lizenzen.facultas.at/document/937872"
}