Bibliography
- 1973
- Levenson et al. 1973, C-5 (as "Forgery in the manner of the Florentine school").
- 1996
- Eisler, Colin. "Berlin's Puzzling 'Princess' - Quattrocento 'Profile' or Victorian Pretender?" In The Print Collector's Newsletter 28/1 (1996): 8, 9 (repro.).