@book { HermannfrFrauMann,
    title = "Hermann für Frau Mann",
    author = "Anke {Bahr} and Lotte {Kinskofer}",
    year = "2013",
    publisher = "hey! publishing",
    address = "München, Deutschland",
    doi = "10.3239/9783942822527",
    url = "https://www.heypublishing.com/document/266398"
}