@book { KatzeKarlaundKaterPirat,
    title = "Katze Karla und Kater Pirat",
    author = "Susanne {Sterzenbach}",
    year = "2021",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1010916"
}