Interview in "Artforum" Magazine, November 1969; as quoted in "Six Years: The Dematerialization of the Art Object from 1966 to 1972" by Lucy R. Lippard, University of California Press, (p. 121), 1973.
1972 From an interview with G Jappe (translated by J Wheelwright), in Studio International, vol.184, no.950, Dec. Quoted in C Harrison and P Wood (eds) Art in Theory 1900-1990 (1992).