• Escher's Ladder
• 1983
• laser cut plywood
• 12 x 12 x 12 in / 30.5 x 30.5 x 30.5 cm
• RIKA0001

• Unit
• 1983
• laser cut plywood
• 6 x 6 x 6 in / 15.25 x 15.25 x 15.25 cm
• RIKA0007(Sold)

• Cubic Tetrahedron (3rd iteration)
• 1982
• wood, automotive lacquer, glue
• 11.8 x 13.75 x 12.2 in / 30 x 35 x 31 cm
• RIKA0006 (Sold)

• Cubic Tetrahedron (3rd iteration) (Detail)
• 1982
• wood, automotive lacquer, and adhesive
• 11.8 x 13.75 x 12.2 in / 30 x 35 x 31 cm
• RIKA0006 (Sold)

• Cantordust
• 1981
• spray paint on wood
• 13.75 x 13.75 x 13.75 in / 35 x 35 x 35 cm
• RIKA0005

• Nine Square Seed
• 1978
• acrylic on canvas
• 48 x 48 in / 121.9 x 121.9 cm
• RIKA0002

• Cubic Tetrahedron
• 1983
• wood and enamel
• 6.5 x 7.5 x 6.5 inches
• RIKA0021 (Sold)

• Wendy's Colors
• 1985
• acrylic on canvas
• 62.25 × 62.25 in (framed)
• RIKA0016

• Wendy's Colors (Detail)
• 1985
• acrylic on canvas
• 62.25 × 62.25 in (framed)
• RIKA0016

• Grid Drawings (series)
• c.1980
• ink on graph paper
• 14 × 14 in / 35.6 × 35.6 cm (each)
• RIKA0023

• Red Cross
• 1980
• 61 × 61 in / 155 × 155 cm
• Private collection

• Untitled (Plexitet)
• c. 1985
• machined Plexiglas and adhesive
• 14.5 x 15.5 x 16.5 inches
• RIKA0019

• Untitled (Plexitet)
• c. 1985
• machined Plexiglas and adhesive
• 14.5 x 15.5 x 16.5 inches
• RIKA0019

• 5,4,5,4,5
• 1980
• acrylic on canvas
• 80.25 x 80.25 in
• RIKA0017

• Blue Sky
• 1978
• acrylic on canvas
• 60.5 × 60.25 in / 153.7 × 153 cm
• RIKA0014