@book { ProzeoptimierunginderProduktion,
    title = "Prozeßoptimierung in der Produktion",
    author = "Heiko {Jacob}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832433727",
    url = "https://m.diplom.de/document/219049"
}