@book { FootballAsAnUrbanPhenomenon,
    title = "Football As An Urban Phenomenon",
    author = "Christoph {Wagner}",
    year = "2004",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638274838",
    url = "https://www.hausarbeiten.de/document/24663"
}