^“Japan's home away from home” (英語). FIFA.com. 2014年3月21日閲覧。 '"Though the popular belief is that Ronaldinho inherited the trick from the one and only Roberto Rivellino, the fact is that it was patented by Sergio Echigo, a nisei – a child of Japanese immigrants – who played for Corinthians in the 1960s."'
^“RIVELINO Rivelino: A very special left foot” (英語). FIFA.com. 2012年8月12日閲覧。 '"Rivelino has been attributed with inventing the elástico, although he has always maintained that he learned the dribbling trick from Sergio Echigo, a midfielder of Japanese descent who was a youth-team colleague of his at Corinthians."'