@book { TanteFritziforeverclever,
    title = "Tante Fritzi - forever clever",
    author = "Brigitte {Teufl-Heimhilcher}",
    year = "2020",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/998098"
}