New Babylon. Versuch einer alternativen Umweltplanung in Befreiung des Alltags: Modelle eines Zusammenlebens ohne Leistungsdruck, Frustation und Angst, F. Böckelmann Ed., Münich 1970, p. 137-154.
Planologie of revolutie in Te elfder Ure, vol. 17, nº 4/5, April/May 1970, p. 165-184. Republished in cat. of the exhibition New Babylon, Gemeentemuseum The Hague, 1974.
About the meaning of construction in Data. Directions in Art, Theory and Aesthetics: An Anthology edited by Anthony Hill, London, Faber and Faber, 1968, pp. 175-179.