@book { Baustellenmanagement,
    title = "Baustellenmanagement",
    author = "Swen {Blume}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832450489",
    url = "https://m.diplom.de/document/220581"
}