Hélio Oiticica, Grupo Frente No. 136, 1956, Gouache on board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33146

Hélio Oiticica, Metaesquema, 1956, Gouache on incised board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35040

Hélio Oiticica, Metaesquema No. 179, 1956, Gouache and ink on board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35047

Hélio Oiticica, Metaesquema No. 237, 1957, Gouache on board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33127

Hélio Oiticica, Metaesquema No. 348, 1958, Gouache on board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33108

Hélio Oiticica, Grupo Frente No. 73, 1955–56, Gouache on card, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33162

Hélio Oiticica, Metaesquema, 1958, Gouache on board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35066

Hélio Oiticica, Metaesquema No. 4066, 1958, Gouache on incised board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35054