The story behind Jerry Kramer's lost Super Bowl ring: 'It was quite incredible that it ever came back'
49 years of Super Bowl rings – The Denver Post
Eyes off the prize: Championship jewelry loses luster after the game is done – The Denver Post
Super Bowl Bling - Jewelry Connoisseur
Super Bowl Rings Throughout the NFL History
Evolution of Super Bowl Rings: History, Costs, Jewels & More Facts – WWD
Super Bowl XLIX: The most pressing Patriots-Seahawks questions
Do the losers get a Super Bowl ring?