Derek Boogaard, NHL Hockey Wikia
Ex-Player Charged in Sale of Pills to Derek Boogaard - The New York Times
Derek's life meant something': Joanne Boogaard vows to keep fighting NHL after son's death
Derek Boogaard family's wrongful death lawsuit vs NHL dismissed
Olympic cyclist Olivia Podmore, who rode for New Zealand at 2016 Games, dead at 24
The effects of fighting in ice hockey: an overview of the ongoing NHL concussion litigation - LawInSport
Athletes donating their brains to science
Family of Derek Boogaard files wrongful-death lawsuit against NHL
THE EFFECTS OF FIGHTING IN ICE HOCKEY: AN OVERVIEW OF THE ONGOING NHL CONCUSSION LITIGATION
concussions
NASCAR driver Bobby East dies at 37 after stabbing attack at California gas station; suspect shot dead by police
Concussions In Hockey