Tom Otterness, The European Notebook, 1983, Pen and brown ink on paper in spiral sketchbook, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35244

Tom Otterness, The European Notebook, 1984, Pen and brown ink on paper in spiral sketchbook, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35236