- Early Period (ca. 1947-57)
- Abstract Paintings (ca. 1952-Present)
- People (ca. 1956-Present)
- Aluminum Sculptures (ca. 1966-68)
- Lithographs (ca. 1966-Present)
- Loneliness (ca. 1968-Present)
- Green Holes (ca. 1969-Present)
- Black Holes (ca. 1971-Present)
- Red Period (ca. 1972-75)
- Pyramids (ca. 1974-88)
- Lines (ca. 1980-Present)
