@book { DerUntergrundImVisierdesSandkartells,
    title = "Der Untergrund. Im Visier des Sandkartells",
    subtitle = "Thriller",
    author = "Cordula {Hamann}",
    year = "2019",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://www.dotbooks.de/document/459053"
}