@book { FourthPartyLogisticsProviderEintheoretischesModell,
    title = "Fourth Party Logistics Provider - Ein theoretisches Modell",
    author = "Constanze {Ries}",
    year = "2006",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638453905",
    url = "https://www.hausarbeiten.de/document/48798"
}