@book { BalancedScorecardundPortfoliosStrategischeProjektplanung,
    title = "Balanced Scorecard und Portfolios. Strategische Projektplanung",
    author = "Carsten {Scupin}",
    year = "2004",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638241380",
    url = "https://www.hausarbeiten.de/document/20182"
}