@book { Blutgruppendit,
    title = "Blutgruppendiät",
    author = "Cornelia {Boboschewski-Sos}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836636087",
    url = "https://m.diplom.de/document/227213"
}