Ragnar Lothbrok (Vikings) - Wikipedia
List of National Football League mascots - Wikipedia
Minnesota Vikings, American Football Database
Ragnar: The former Minnesota Vikings mascot through the years
Viktor The Viking, Mascot Wiki
TIL The Minnesota Vikings are the only NFL team to have an actual human as their mascot. His name is Ragnar : r/todayilearned
Hub Meeds, Viktor & Ragnar – Mascots of the Minnesota Vikings
Vikings drop mascot Ragnar after he reportedly asks for $20,000 a game - Los Angeles Times
List of National Football League mascots - Wikiwand
A brief history of Minnesota Vikings mascots - Daily Norseman
Minnesota Vikings, American Football Wiki
Contract for Vikings mascot Ragnar not renewed