Ashton, Dore. À rebours: La rebelión informalista / The Informal Rebellion [1939–1968]. Centro atlántico de arte moderno, Las Palmas de Gran Canaria, Spain, and Museo nacional centro de arte Reina Sofía, Madrid, 1999.
Mark Rothko: Works on Paper will ultimately document approximately 2,600 works from public and private collections worldwide. Cataloging is ongoing, and works and information will be added to the site during the coming years.