Lavin, Irving, "Five Youthful Sculptures by Gianlorenzo Bernini and a Revised Chronology of his Early Works," The Art Bulletin, L, 1968, 223-48. Revised and reprinted as "Five New Youthful Sculptures by Gianlorenzo Bernini and a Revised Chronology of his Early Works," in Lavin, Visible Spirit, I, London, 2007, 186-286.