@book { RankingdesVersicherungsangebotesimInternet,
    title = "Ranking des Versicherungsangebotes im Internet",
    author = "Marcus {Rösch}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832408947",
    url = "https://m.diplom.de/document/216795"
}