@book { EngpsseinderLogistikProblemeFaktorenAuswirkungen,
    title = "Engpässe in der Logistik: Probleme, Faktoren, Auswirkungen",
    author = "Henrik {Janßen}",
    year = "2015",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/296789"
}