@book { MethodenzurOptimierungderexternenTransportkosteninderDistributionslogistik,
    title = "Methoden zur Optimierung der externen Transportkosten in der Distributionslogistik",
    author = "René {Linke}",
    year = "2012",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842844452",
    url = "https://m.diplom.de/document/229347"
}