[558].Lygia Clark, ‘The Bichos’ (1960), trans. in Cornelia H. Butler and Luis Pérez-Oramas, eds, Lygia Clark: The Abandonment of Art, 1948ā1988, exh. cat., Museum of Modern Art, New York (New York, 2014), p.160; ‘Letter to Piet Mondrian, May 1959’, trans. in Butler and Pérez-Oramas, eds, Lygia Clark: The Abandonment of Art, p.59.Briony Fer, ‘Lygia Clark and the problem of art’, in Butler and Pérez-Oramas, eds, Lygia Clark: The Abandonment of Art, pp.223——228.