Soussloff, Catherine M. (1987). "Old Age and Old-Age Style in the 'Lives' of Artists: Gianlorenzo Bernini". Art Journal. 46 (2): 115–121. doi:10.2307/776888. JSTOR776888.
"Bernini and the birth of Baroque portrait sculpture". Choice Reviews Online. 46 (10): 46–5440–46-5440. June 2009. doi:10.5860/choice.46-5440 (inactive 1 July 2025).{{cite journal}}: CS1 maint: DOI inactive as of July 2025 (link)
Soussloff, Catherine M. (1987). "Old Age and Old-Age Style in the 'Lives' of Artists: Gianlorenzo Bernini". Art Journal. 46 (2): 115–121. doi:10.2307/776888. JSTOR776888.
Raatschen, Gudrun (1996). "Plaster Casts of Bernini's Bust of Charles I". The Burlington Magazine. 138 (1125): 813–816. JSTOR887180.