@book { ZurkonomievonRckversicherungen,
    title = "Zur Ökonomie von Rückversicherungen",
    author = "Rüdiger {Reissaus}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832438609",
    url = "https://m.diplom.de/document/219329"
}