Serious fan violence taking on life of its own; can it be stopped? - CBSSports.com
When Football Fans Attack: How to Fix the NFL's Violence Problem - The Atlantic
In Argentina, Violence Is Part of the Soccer Culture - The New York Times
Football hooligans: Firms, films & violence culture among supporters | Goal.com US
Inside the violent world of football's Ultras | Daily Mail Online
5 Most Dangerous Fanbases in English Football Today | Balkanski Navijaci
Football hooliganism - Wikipedia
The Worst Behaved Fans In English Football Have Been Revealed - SPORTbible
Unfriendly confines: the unsung history of America's low-key hooliganism | US sports | The Guardian
A Sociological History of Soccer Violence - The Atlantic
Survey Reveals the Worst Behaved NCAA Football Fans - Play Michigan
A quietly escalating issue for NFL: Fan violence and how to contain it - The Washington Post
Inside the world's most dangerous football league | Foreign Correspondent - YouTube
Ranked: The most violent fans in football – The Versed
Ranked: The most violent fans in football – The Versed
Which Premier League team has the worst-behaved fans? | For The Win
Which Premier League team has the worst-behaved fans? | For The Win
Soccer's Most Rowdy Fanbases In The World
Shocking rise of fan disorder leaves Ligue 1 facing an existential crisis | Ligue 1 | The Guardian
10 football clubs with the most violent fans
globalEDGE Blog: Are Violent Fans Making the Most Popular Sport Lose Business? >> globalEDGE: Your source for Global Business Knowledge
BRUISINGS, BURNINGS AND BEATINGS: Europe's Worst Soccer Hooligans
Football's wall of SHAME: UK's most violent and ferocious hooligans REVEALED - Daily Star
England's hooligan problem: Why do some Three Lions fans cause such trouble away from home?
England: The 21 teams with the worst-behaved fans in terms of arrests so far this season | Balkanski Navijaci
