NFL couldn't improve goal-line technology (much) even if it wanted to - ESPN - NFL Nation- ESPN
DGA Quarterly Magazine, Fall 2011
ESPN's Monday Night Football Delivers 13.8 Million Viewers, the Second-Most-Watched MNF Week 2 Telecast Since 2014 - ESPN Press Room U.S.
The NFL: More Show Than Game – Rolling Stone
Why The NFL Puts Computer Chips In Each Football
For Monday Night Football, ESPN's 'GREMI' Model Keeps Onsite Presence Sizable; Some Replay, Graphics Ops Shift to Bristol
Episode 317: ESPN's Troy Aikman Kicks off Monday Night Football with a Cold Can of EIGHT
Before Watching Chiefs-Ravens On MNF, Learn Why ESPN's NFL Visuals Excel - ESPN Front Row
Behind-the-scenes technology tour of ESPN's Monday Night Football production – GeekWire
Penalty shoot-out (association football) - Wikipedia