@book { DieBefreiungderBcher,
    title = "Die Befreiung der Bücher",
    author = "Andrei {Teusianu}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836635431",
    url = "https://m.diplom.de/document/227175"
}