@book { ZurStigmatisierungvonFuballfans,
    title = "Zur Stigmatisierung von Fußballfans",
    author = "Christian {Gundlach}",
    year = "2013",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656358893",
    url = "https://www.hausarbeiten.de/document/208522"
}