@book { Katzenspuren,
    title = "Katzenspuren",
    subtitle = "Vom Weg der Katze durch die Welt",
    author = "Detlef {Bluhm}",
    year = "2016",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://www.dotbooks.de/document/317471"
}