Grace Glueck, 'Trend Towards Trendlessness', Art in America, vol. 55, no. 6, November-December 1967, pp.122-6, cf. pp.124, 126 (ill.).
Suzanna Singer and Alexander van Grebenstein, Robert nMangold: Paintings 1964-1982, Amsterdam: Stedelijk Museum, 1982, cat. no. 56 (with date as 1967). (This catalogue of Mangold's paintings was published on the occasion of an exhibition of the artist's work at the Stedelijk Museum, October-December 1982.)