@book { CostEstimationinSoftwareProductLineEngineering,
    title = "Cost Estimation in Software Product Line Engineering",
    author = "Sebastian {Rosensteiner}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836621359",
    url = "https://m.diplom.de/document/226295"
}