Boogaard's death ruled an accident
Traumatic Brain Injury and Alzheimer's Disease: The Cerebrovascular Link - eBioMedicine
Our View: Fighting culture will haunt professional hockey - Post Bulletin
Contact sports increase Parkinson's disease risk
CTE found in former soccer players, study shows
Tell the Truth!: The National Hockey League Concussion Litigation
Boogaard's brain: A tragic tale of hockey, head injuries and a sport in denial
Hockey has lagged behind innovating better, safer helmets — but a change is coming - The Athletic
Faces of concussions: NHL's head-on battle with an epidemic – New York Daily News
Hockey Concussions: The NHL Fights the Facts
Study Reveals Hockey Players Have An Increased Risk Of Degenerative Brain Disease
Chronic Traumatic Encephalopathy (CTE): Symptoms & Treatment
Pain, agony and 'years of duress': How hockey wives are fighting back over players' chronic brain injuries
Down Goes Brown: The pros and cons of fighting in the NHL