@book { DasdeutscheSystemderHausmllentsorgung,
    title = "Das deutsche System der Hausmüllentsorgung",
    subtitle = "Eine normative und positive volkswirtschaftliche Untersuchung",
    author = "Christoph {Wonke}",
    year = "2009",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1106765"
}