@book { DiabetesimGriffin12Wochen,
    title = "Diabetes im Griff in 12 Wochen",
    author = "Astrid {Schobert}",
    year = "2015",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403945"
}