@book { DieschweizerischeBetreibung,
    title = "Die schweizerische Betreibung",
    author = "Isabel {Kupka}",
    year = "2011",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842815506",
    url = "https://m.diplom.de/document/228528"
}