1-388 All the Colors of the Chromatic Circle Interacted by Blue Ultramarine , 1980. Acrylic and graphite on canvas, 78 x 70 in. (198 x 177.8 cm.)

1-389 All the Colors of the Chromatic Circle Interacted by Orange Cadmium , 1980. Acrylic and graphite on canvas, 78 x 70 in. (198 x 177.8 cm.)

1-450 All the Colors of the Chromatic Circle Interacted by Orange Cadmium , 1980. Acrylic and graphite on canvas, 78 x 70 in. (198 x 177.8 cm.)

1-437 All the Colors of the Chromatic Circle Interacted by Blue Ultramarine , 1980. Acrylic and graphite on canvas, 78 x 70 in. (198.12 x 177.8 cm.)

1-445 All the Colors of the Chromatic Circle Interacted by Blue Ultramarine , 1980. Acrylic and graphite on canvas, 78 x 70 in. (198 x 177.8 cm.)

1-392 All the Colors of the Chromatic Circle Interacted by Orange Cadmium , 1980. Acrylic and graphite on canvas, 78 x 70 in. (198 x 177.8 cm.)

12 Marks Green Grey. To Max Bill , 1973. Acrylic and graphite on paper. 25 1/2 x 19 5/8 in. (65 x 50 cm.)

Analysis of the Tempest "Giorgione" , 1976. Acrylic, collage and pencil on paper. 27 3/16 x 38 3/8 in. (69.5 x 97.5 cm.)

The Hanover Color Constellation , 1982/2012. Acrylic on wood. Dimensions variable. Edition of 3

The Hanover Color Constellation , 1982/2012. Acrylic on wood. Dimensions variable. Edition of 3

Parall. at Three Levels , from the Color Constellation Series, 1983. Acrylic, graphite and marker on paper, 11 x 14 in. (28 x 35.5 cm.)

Creative Order , From the Color Constellation Series, 1983. Acrylic, graphite and marker on paper, 11 x 14 in. (28 x 35.5 cm.)

Chance Order , From the Color Constellation Series ,1983. Acrylic, graphite and marker on paper, 11 x 14 in. (28 x 35.5 cm.)

Floor Level Order , From the Color Constellation Series, 1983. Acrylic, graphite and marker on paper, 11 x 14 in. (28 x 35.5 cm.)

Paralleled Connections, From the Color Constellation Series, 1983. Acrylic, graphite and marker on paper, 11 x 14 in. (28 x 35.5 cm.)

The Chromatic Circle Order , From the Color Constellation Series, 1983. Acrylic, graphite and marker on paper, 11 x 14 in. (28 x 35.5 cm.)

25 – 43 not order , 1975. Colored pencil on paper, 19 1/3 x 27 1/2 in. (49 x 69.8 cm.)

Blue, Red, Yellow with White Reduction , 1976. Graphite and acrylic on paper, 27 1/2 x 23 1/3 in. (70 x 60 cm.)

The Blue, the Red, the Yellow , 1975. Ink and graphite on paper, 27 3/8 x 19 1/2 in. (69.5 x 49.5 cm.)

1-77 of 77 Tonal Value Classif. Of 77 Stripes (All of Them) from “Madonna Di Pellegrini”, Caravaggio , 1977. Collage and graphite on paper, 21 1/2 x 29 in. (54.5 x 73.5 cm.)

1-7 Tonal Value Key , 1977. Acrylic on canvas, 33 1/2 x 49 in. (85 x 124.5 cm.)

Black printed paper analysis , c. 1976. Collage and rubber stamp on paper, 18 1/2 x 25 5/8 in. (47 x 65 cm.)

Black Constellation , 2013. Acrylic on canvas. 31 1/2 x 47 1/4 in. (80 x 120 cm.)

Dirty Geometry , 2012. Acrylic on canvas, 31 1/2 x 47 1/4 in. (80 x 120 cm.)

Black Constellation , 2013. Acrylic on canvas, 14 3/4 x 19 5/8 in. (40 x 50 cm.)

Black Constellation , 2013. Acrylic on canvas, 14 3/4 x 19 5/8 in. (40 x 50 cm.)

To Ástor Piazzolla , 2012. Acrylic on canvas, 16 1/8 x 20 in. (41 x 51cm.)