@book { MethodenvergleichTheoriePraxisdesProjektmanagements,
    title = "Methodenvergleich - Theorie & Praxis des Projektmanagements",
    author = "Fabian {Werren}",
    year = "2008",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640145164",
    url = "https://www.hausarbeiten.de/document/114267"
}