NFL: 'Sky judge' proposal should be embraced by league
Goodbye, pass interference replay review - Lessons learned from
NFL's roughing the passer calls beg for further replay review
Replay in sports: Ranking the systems from best to worst
The CFL has figured instant replay out. How long until the NFL and
No momentum for big instant replay rule changes – Football Zebras
The 5 O'Clock Club: How instant replay is killing the NFL - Hogs Haven
N'Keal Harry ruling was changed by new partial sky judge procedure
NFL Sky Judge: How the New Process Works + Impact on Games
NFL's roughing the passer calls beg for further replay review
Breaking down the NFL's 6 new rules for 2021 season - Pride Of
NFL Sky Judge: How the New Process Works + Impact on Games
NFL's instant replay officials have new powers, but owners weren't
Official (gridiron football) - Wikipedia
NFL Approves Expanded Authority for Replay Officials Ahead of 2021