@book { InformelleKooperationundKommunikationinProjektgruppen,
    title = "Informelle Kooperation und Kommunikation in Projektgruppen",
    author = "Samy {El-Bouz}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836619509",
    url = "https://m.diplom.de/document/226154"
}