Broken Circle/Spiral Hill (English Wikipedia)

Hobbs, Robert; Alloway, Lawrence; Coplands, John; Lippard, Lucy R. (1981). Robert Smithson: Sculpture. Ithaca, NY and London: Cornell University Press. pp. 208–214. ISBN 0-8014-1324-9.

books.google.com

Shapiro, Gary (1997). "Uncanny Materiality" in the book Earthwards Robert Smithson and Art After Babel. Berkeley: University of California Press. p. 111. ISBN 9780520212350. Retrieved 10 September 2021.

"Learn". Robert Smithson | Broken Circle/Spiral Hill (in Dutch). Archived from the original on 2021-09-04. Retrieved 2021-09-07.

Beenker, Erik (November 11, 1972). "De Gebroken Cirkel blijft". www.delpher.nl (in Dutch). Nieuwsblad van het Noorden. Archived from the original on 2021-09-07. Retrieved 2021-09-07.

Shanken, Edward A. (2013). "Broken Circle &/ Spiral Hill?: Smithson's spirals, pata- physics, syzygy and survival". Technoetic Arts: A Journal of Speculative Research. 11 (1): 3–14. doi:10.1386/tear.11.1.3_1.

"Wereldberoemd landart-werk Broken Circle bij Emmen is dit jaar vier keer te bezoeken". Dagblad van het Noorden (in Dutch). March 12, 2020. Archived from the original on 2021-06-16. Retrieved 2021-09-07. Dit bedrijf was nauw betrokken bij de totstandkoming en het beheer van het kunstwerk. ("This company was closely involved in the creation and maintenance of the artwork.")

Novak, Anya (February 2021). Broken Circle and Spiral Hill: having entropy the Dutch way. Holt/Smithson Foundation Scholarly Texts. ISBN 9781952603174. Retrieved 29 June 2023.

Tuchman, Phyllis (27 January 2017). "How Do You Sell a Work of Art Built Into the Earth?". The New York Times. Retrieved 5 September 2021.

"Directions from Sonsbeekpark to Broken Circle". OpenStreetMap. Archived from the original on 2015-02-16. Retrieved 2021-09-08.

Robert Smithson interviewed by Paul Cummings for the Archives of American Art, Smithsonian Institution

Sparklet (2011-11-24). "Sparklet: Gebroken cirkel". Sparklet (in Dutch). Archived from the original on 2021-09-08. Retrieved 2021-09-08.

MARIJNISSEN, HANS (2011-10-25). "Na veertig jaar is de Emmer' cirkel gesloten". Trouw (in Dutch). Retrieved 2021-09-07.

"Directions from Sonsbeekpark to Broken Circle". OpenStreetMap. Archived from the original on 2015-02-16. Retrieved 2021-09-08.
Sparklet (2011-11-24). "Sparklet: Gebroken cirkel". Sparklet (in Dutch). Archived from the original on 2021-09-08. Retrieved 2021-09-08.
"Sjouke Zijlstra Centrum voor kunsten in Emmen". Woest en Ledig (in Dutch). Archived from the original on 2021-09-07. Retrieved 2021-09-07.
"Wereldberoemd landart-werk Broken Circle bij Emmen is dit jaar vier keer te bezoeken". Dagblad van het Noorden (in Dutch). March 12, 2020. Archived from the original on 2021-06-16. Retrieved 2021-09-07. Dit bedrijf was nauw betrokken bij de totstandkoming en het beheer van het kunstwerk. ("This company was closely involved in the creation and maintenance of the artwork.")
"Learn". Robert Smithson | Broken Circle/Spiral Hill (in Dutch). Archived from the original on 2021-09-04. Retrieved 2021-09-07.
Beenker, Erik (November 11, 1972). "De Gebroken Cirkel blijft". www.delpher.nl (in Dutch). Nieuwsblad van het Noorden. Archived from the original on 2021-09-07. Retrieved 2021-09-07.

"Sjouke Zijlstra Centrum voor kunsten in Emmen". Woest en Ledig (in Dutch). Archived from the original on 2021-09-07. Retrieved 2021-09-07.