I. Bas Jan Ader, William Leavitt, Ger van Elk. Pomona College Gallery, Montgomery Art Center, Pomona, ca. 1972;
II. Daniel Buren, Es Malt, Konrad Fischer, Düsseldorf 1975;
III. Stanley Brouwn, 100mm 879 mm, Art & Project, Amsterdam 1978;
IV. Jan Dibbets, Roodborst Territorium, Sculptuur 1969, Seth Siegelaub. Verlag Gebr. König, Cologne/New York 1970; V. Sol LeWitt, The Location of Eight Points, Max Protetch Gallery, Washington 1974.