@book { InstitutionellePublicPrivatePartnershipsGrundsachverhalteundempirischeAnalysen,
    title = "Institutionelle Public Private Partnerships: Grundsachverhalte und empirische Analysen",
    author = "Martin {Herbold}",
    year = "2012",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842829763",
    url = "https://m.diplom.de/document/229191"
}