Penalty kicks: What, when, why and other rules

Penalties provide the peak of footballing drama, creating legacies of heroes or villains in a split second

Clarification: Law 16, The Goal Kick

Law 10 - The Outcome of a Match

Red cards, penalty kicks and more in soccer: what applies when?

World Cup extra time rules, explained - The Washington Post

combinatorics - Number of ways a penalty kick shootout can be decided in the first round - Mathematics Stack Exchange

Soccer Penalty Kick

What Is A Penalty Kick In Soccer

Definitive guide to a penalty shootout: the rules, techniques - and how to win

Germany Defeats Italy in Shootout Because the Rules Require a Winner - The New York Times

Peter Walton explains why Chelsea penalty was retaken as both teams encroached on box - Mirror Online