@book { FhrunginProjekten,
    title = "Führung in Projekten",
    author = "Sascha {Virnich} and Marcus {Funke} and Frederik {Kummetat}",
    year = "2010",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640716630",
    url = "https://www.hausarbeiten.de/document/157945"
}