@book { DasGeheimnisderNonneErsterRomanBlutbann,
    title = "Das Geheimnis der Nonne - Erster Roman: Blutbann",
    author = "Petra E. {Jörns}",
    year = "2015",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://m.dotbooks.de/document/305532"
}