Bridget Riley, Study for Painting, (12011-DG), 1965, Gouache and pencil on graph paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38326

Bridget Riley, Scale Study for Cataract Series, 1967, Gouache and pencil on graph paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38161

Bridget Riley, Study, 1967, Gouache and pencil on graph paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38162

Bridget Riley, [Untitled], 1978, Colour screenprint on wove paper, Queensland Art Gallery and Gallery of Modern Art, Brisbane. https://dartabase.art/cite/qagoma/12977

Bridget Riley, Big Blue, 1981–82, Oil over synthetic polymer paint on linen, Queensland Art Gallery and Gallery of Modern Art, Brisbane. https://dartabase.art/cite/qagoma/7210