@book { TrinkwasserversorgungiminternationalenVergleich,
    title = "Trinkwasserversorgung im internationalen Vergleich",
    author = "Thoralf {Schlüter}",
    year = "2005",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832487591",
    url = "https://m.diplom.de/document/223945"
}