@book { Imagination,
    title = "Imagination",
    subtitle = "Und alles Mögliche wird möglich...",
    author = "Peter {Spiegel} and Rüdiger {Fox}",
    year = "2024",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1512188"
}