@book { Frhstckzuviert,
    title = "Frühstück zu viert",
    author = "Annemarie {Schoenle}",
    year = "2013",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    doi = "10.3239/9783955202231",
    url = "https://m.dotbooks.de/document/212945"
}