Adjustable relief 1960/2000 Wood
Volume and Void relief 1973
Hidden Circles 1973 paint on canvas
Engraved line drawing 1990
Engraving 1990
Relief 2000
Contra 2 relief 2010-11
Transformable construct 2013 stainless steel
Hanging double-sided relief 1963 wood, 91 x 91 x 10
Relief 1969
Helix of nine slices of a cube 1973
Five-part wall construction 1979
Double Crosses 1980 print
Relief 1994
Ten acute triangles 2000