@book { Provinzprinzen,
    title = "Provinzprinzen",
    subtitle = "Erotischer Roman",
    author = "Katalin {Sturm}",
    year = "2012",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    doi = "10.3239/9783943835649",
    url = "https://www.dotbooks.de/document/199248"
}