@book { ProjektplanungvonGroprojekten,
    title = "Projektplanung von Großprojekten",
    author = "Markus  {Lange-Stuntebeck}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640932733",
    url = "https://www.hausarbeiten.de/document/172896"
}