1981
Rosalind Krauss, Passages in Modern Sculpture, Cambridge, Mass. And London: MIT Press, 1981, pp. 266-7 and Alex Potts, Sculptural Imagination, pp. 236-42, 263, 312-3, 302-4.

https://www.amazon.com/Passages-Modern-Sculpture-Rosalind-Krauss/dp/0262610337#:~:text=Review,Smithson%2C%20and%20Michael%20Heizer%5D.