NFL Journal: Looking back at Denver's dominant run game in the late 1990s
Super Bowl XXXII: Denver Broncos vs. Green Bay Packers (1998)
Brett Favre, NFL Legend, Hall of Fame QB
BBC News, Super Bowl XXXII
Super Bowl XXXI - Wikipedia
These are the 7 teams that have repeated as champions in the Super Bowl era
The Top All-Time Denver Broncos Taken in Each Round of the NFL Draft
Looking back at Super Bowl XXXII: 25 years later
How do NFL teams fare in season following Super Bowl loss? – NBC Sports Chicago
List of Super Bowl champions, Packers Wiki
1986 Bears, 1997 Packers among great teams that show how hard repeating is in NFL