@book { SourcingStartupSuccess,
    title = "Sourcing Start-up Success",
    author = "Adrian {Rößler}",
    year = "2011",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842820074",
    url = "https://m.diplom.de/document/228602"
}