Exh. cat., Mario Merz, Paris, Musée d'Art Moderne de la ville de Paris, May - September 1981 (illustrated).
Exh. cat., Mario Merz, Nagoya, Institute of Contemporary Art, 1988 (p. 66 illustrated).
R. Barnes, The 20th-century art book, London, 1996, p. 388 (illustrated in colour pl. 304).
L. Gamwell, Exploring the invisible. Art, science, and the spiritual, Princeton/Oxford, 2002, p. 277 (illustrated pl. 278).
Minneapolis, Walker Art Center, Mario Merz, January - March 1972, no. 7.
New York, John Weber Gallery, De Europa, April - May 1972.
Vienna, Galerie nächst St. Stephan, Über Mario Merz, October - November 1983, p. 104 (illustrated p. 140).
San Marino, Palazzo Congressi ed Esposizioni, Mario Merz, November - January 1984, no. 59 (illustrated p. 70).
New York, Solomon R. Guggenheim Museum, Mario Merz, September - November 1989, no. 55.
Barcelona, Fundació Antoni Tàpies, Mario Merz, March - June 1993, no. 10, pp. 64-67 (illustrated in colour).
Berlin, Martin-Gropius-Bau, Die Epoche der Moderne. Kunst im 20. Jahrhundert, May - July 1997, no. 304 (illustrated in colour p. 388). London, Tate Modern, Zero to Infinity: Arte Povera 1962-1972, May - August 2001, no. 84 (illustrated in colour p. 256). This exhibition later travelled to Minneapolis, Walker Art Center, October 2001 - January 2002; Los Angeles, Museum of Contemporary Art, April - September 2002 and Washington, Hirshhorn Museum and Sculpture Garden, October 2002 - January 2003.