Hvem daterte Willys de Castro?

Willys de Castro (February 16, 1926 – June 5, 1988) was a Brazilian visual artist, poet, graphic designer, industrial designer, stage designer and magazine editor. De Castro is best known for his "Active object" series and is considered to be a pioneer and founding contributor of the Neo-Concrete Movement.

Hércules Rubens Barsotti (July 20, 1914 – December 21, 2010) was a Brazilian painter, graphic designer, scenographer and costume designer. He was a member of the Neo-Concrete Movement.