@book { ErnieMarvelDiezweiHimmelsbotenDerRegenbogen,
    title = "Ernie & Marvel - Die zwei Himmelsboten: Der Regenbogen",
    author = "Sabine {Beyer}",
    year = "2023",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1418689"
}