What is the ABBA penalty shootout format? The new spot-kicks

FIFA and UEFA have trialled the system on the international stage and now it will be introduced in the EFL Cup, EFL trophy and playoffs

The 5 worst things about the new ABBA penalty shoot-out as Arsenal win Community Shield in bizarre fashion - Irish Mirror Online

Community Shield 2017: All you need to know about the new ABBA shootout format in football-Sports News , Firstpost

The psychology of the penalty shootout: why movement is key and hesitation can be fatal, Manchester City

ABBA penalty shoot-out trial by Uefa - Dutch Referee Blog

US loses to Sweden on penalty kicks in its earliest Women's World Cup exit ever

Penalty shoot-out (association football) - Wikipedia

US bounced from Women's World Cup by Sweden on penalty kicks

Are penalty shootouts the fairest way to break football deadlocks?

Community Shield: Arsenal v Chelsea - story of the match