@book { VielTheaterumsTheater,
    title = "Viel Theater ums Theater",
    author = "René {Omlor}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832476748",
    url = "https://m.diplom.de/document/222944"
}