@book { DerurbaneinformelleArbeitsmarktinEntwicklungslndern,
    title = "Der urbane informelle Arbeitsmarkt in Entwicklungsländern",
    author = "Katharina {Kainz}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832479558",
    url = "https://m.diplom.de/document/223197"
}