@book { MecklenburgVorpommern,
    title = "Mecklenburg-Vorpommern",
    author = "Timm {Allrich} and Mario {Müller}",
    year = "2020",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/924937"
}