@book { DieErhebungvonEntwsserungsgebhreninNordrheinWestfalen,
    title = "Die Erhebung von Entwässerungsgebühren in Nordrhein-Westfalen",
    author = "Axel {Schröder}",
    year = "2003",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095518"
}