Sale: Sotheby's, Milan, Modern and Contemporary Art, 25 November 2003, Lot 234

Zonca & Zonca, Milan

Private Collection (acquired directly from the above)

Thence by descent to the present owner

P. W. J. Sten, "De Wereld van Novalis en die van Pomodoro", in Hervormd Nederland, 1969, n.p.,  another example illustrated

Francesco Leonetti, "Uno Scultore Come è: Arnaldo Pomodoro", in Bolaffiarte, Turin 1971, n.p., another example illustrated

Sam Hunter, Arnaldo Pomodoro, New York 1982, p. 76, no. 69, another example illustrated

Mary Pat Fisher and Paul Zelanski, Shaping Space, Fort Worth 1995, p. 80, another example illustrated

Arnaldo Pomodoro, Sphere within a Sphere for the U.N. Headquarters, Rome 1997, pp. 76-77, another example illustrated

Fabrizia Buzio Negri, "Uno Squarcio sul Mistero", in La Prealpina, Varese 24 December 1998, p. 33, another example illustrated

Exhibition Catalogue: Varese, Castello di Masnago, Arnaldo Pomorodo a Varese, 1998-99, pp. 70-71, another example illustrated

Arnaldo Pomodoro, Scritti Critici per Arnaldo Pomodoro e Opera dell'Artista 1955-2000, Milan 2000, p. 328, another example illustrated

Exhibition Catalogue: Ischia, Torre Guevara, Arnaldo Pomorodo alla Torre Guevara di Ischia, 2003, p. 26, another example illustrated

Flaminio Gualdoni, Arnaldo Pomodoro: Catalogo Ragionato della Scultura, Vol. II, Milan 2007, p. 534, no. 430, another example illustrated