@book { IchhelfemirselbstDiabetes,
    title = "Ich helfe mir selbst - Diabetes",
    author = "Dr. Andrea {Flemmer}",
    year = "2018",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/441039"
}