@book { DieKreuzfahrerin,
    title = "Die Kreuzfahrerin",
    subtitle = "Historischer Roman",
    author = "Stefan {Nowicki}",
    year = "2013",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    doi = "10.3239/9783955203887",
    url = "https://www.dotbooks.de/document/232989"
}