First Study for on the Wharf, Livorno  2001

First Study for the President Factory  2002

First Study for The Arrow Carriers  1978

Study for The Bus Stop  2009

Study for the Yellow Truck 

Study for Waiting for the Train  1969

Study for the Reservoir, Centennial Park  1989

First Study for Ring-a-Rosy  1986

First oil sketch for The Picnic  1979

Final Study for the Rome Metro 

Study for The Five Factories  1987