1. The Angelic Consolation of St. Francis of Assisi in Post-Tridentine Painting;Askew;Journal of the Warburg and Courtauld Institutes,1969
2. The Mysterious Meaning of Leonardo’s Saint John the Baptist;Farago;Leonardo’s Projects, c. 1500–1519,1999
3. Stace, Christopher (2020). The Conformity of the Life of the Blessed Francis to the Life of the Lord Jesus, New City Press. 3 vols.
4. Bayer, Andrea (2004). Painters of Reality: The Legacy of Leonardo and Caravaggio in Lombardy, The Metropolitan Museum of Art. Exh. cat., Museo Civico “Ala Pozone”, Cremona, 14 February–2 May 2004, and Metropolitan Museum of Art, New York, 27 May–15 August 2004.
5. Some Seventeenth-Century Appraisals of Caravaggio’s Coloring;Bell;Artibus et Historiae,1993