Full list of current World Boxing Champions (July 2018)
Boxing - WBC/WBA/WBO Cruiserweight - David Haye v Enzo Maccarinelli - The O. David Haye celebrates his victory over Enzo Maccarinelli following the WBC/WBA/WBO Cruiserweight fight at the O2 in London Stock
The Different Boxing Title Belts Explained - Pledge Sports
Lawrence Okolie wins WBA continental cruiserweight title | Daily Mail Online
Haye in limbo after American refuses to fight | Boxing | The Guardian