The Impossibility of the Field Goal - Brian Kenneth Swain
Altitude had major impact on performances at Mexico City Olympic Games - Global Sport Matters
Are Field Goals Easier in Denver?
Verify: Does Denver's mile high altitude really affect the outcome of sports games?
Are Field Goals Easier in Denver?
The highest form of home field advantage
2016 Eastern Washington University Football Fact Book by Eastern Washington University - Issuu
The highest form of home field advantage
Is impact of Denver's altitude fact or fiction?
Are field goals in Denver easier? TL;DR - Yes. : r/nfl