@book { MayaunddasGeheimnisdesMandelbrotbaums,
    title = "Maya und das Geheimnis des Mandelbrotbaums",
    author = "Serena {Müller}",
    year = "2023",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1322162"
}