@book { WieSchmetterlingeberdenWellen,
    title = "Wie Schmetterlinge über den Wellen",
    author = "Astrid {Zingler}",
    year = "2023",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1322782"
}