@book { ProjektmanagementinderBauplanungundBauabwicklung,
    title = "Projektmanagement in der Bauplanung und Bauabwicklung",
    author = "Andreas {Olpp} and Tanja {Schwenk}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832441388",
    url = "https://m.diplom.de/document/219762"
}