@book { ErlebnisweltArena,
    title = "Erlebniswelt Arena",
    author = "Stefan M. {Pfaff}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832421816",
    url = "https://m.diplom.de/document/218009"
}