W. Cohen, Pantheon , October II, 1929, p. 481. C.H. de Jong, "Portretten van Jan van Scorel en Agatha van Schoonhoven", Oud-Holland , XLIV, 1929, pp. 267 ff., esp. 278, fig. 15. M.J. Friedländer, Die Altniederländische Malerei , Leiden, 1936, XIII, p. 160, no. 230. L. Baldass, "Bildnisse des niederländeischen Romanismus", Städel-Jahrbuch , VI, 1930, p. 85. G.J. Hoogewerff, De Noord-Nederlandsche Schilderkunst , The Hague, 1936-47, IV, p. 332, fig. 154; V, p. 158, no. 55. M.J. Friedländer, Early Netherlandish Painting , New York and Washington, 1975, XIII, p. 92, no. 230, pl. 117. R. Groshans, Maerten van Heemskerck: Die Gemälde , Berlin, 980, p. 132, no. 27, fig. 30. Old Master paintings. An illustrated summary catalogue, Rijksdienst Beeldende Kunst/The Netherlandish Office for the Fine Arts , Zwolle and The Hague, 1992, p. 134, no. 1086