The Enduring Appeal of Ronaldo, Soccer's Original Phenomenon - The New York Times
22 Goals': Ronaldo, 2002 World Cup Final in Japan - The Ringer
Only Cristiano was as talented as him at 18' – Leao compared to both Ronaldos by former coach
Cristiano Ronaldo - Team, Kids & Facts
BBC - Jonathan Stevenson: Messi and Ronaldo, rivals in greatness
Anatomy of a goal: Ronaldo's unbelievable solo effort against Compostela
Did Ronaldo (the brazillian) play the best football of his career while at Real Madrid ? - Quora
The Enduring Appeal of Ronaldo, Soccer's Original Phenomenon - The New York Times
Cristiano Ronaldo: Has the digital age changed football fans?