@book { MeinwunderbaresschchternesKind,
    title = "Mein wunderbares schüchternes Kind",
    author = "Inke {Hummel}",
    year = "2021",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/993648"
}