NFL History: 100 objects that tell the story of football - Sports Illustrated
Detection and Treatment of Concussions in Student Athletes
Two crises for NFL, but experts see no damage to 'extraordinarily durable' brand
League of Denial: The NFL's Concussion Crisis (2013) - PBS Frontline reveals the hidden story of history of the NFL and brain injuries [1:53:56] : r/Documentaries
Violence of football is becoming too difficult to justify – The Denver Post
Films Media Group - League of Denial: The NFL's Concussion Crisis
Inside the NFL's All-Media Blitz: How Roger Goodell Conquered Hollywood
Concussion (Movie Tie-in Edition) (Audible Audio Edition): Jeanne Marie Laskas, Hillary Huber, Random House Audio: Audible Books & Originals
Documentary: For years, NFL ignored concussion evidence
Brain damage, sport and human rights: why I'm done with American football, Guardian sustainable business
League of Denial: The NFL's Concussion Crisis (full documentary)
20 Best Professional Football Books of All Time - BookAuthority
Moments In Time - NFL Topics - ESPN