@book { 50komplexeFallsituationen,
    title = "50 komplexe Fallsituationen",
    author = "Karin {Klas} and Stefanie {Mayrhofer}",
    year = "2018",
    publisher = "facultas",
    address = "Wien, Österreich",
    url = "https://campus-lizenzen.facultas.at/document/924761"
}