Amateur boxing in the last 59 years. Impact of rules changes on the type of verdicts recorded and implications on boxers' health | British Journal of Sports Medicine
Boxing - Wikipedia
What is the age limit to enter in the amateur boxing field? - Quora
How Amateur Boxing Matches are REALLY Made | The Glowing Edge
What are the rules of boxing?
England Boxing Rule book - England Boxing
Differences between Amateur and Professional Boxing
Why English amateur boxing has been left reeling by controversial rule | Boxing | The Guardian
Amateur Boxing Drops The Headgear In Glasgow | Only A Game