The question is discussed by Lisa Trentin in "What's in a hump? Re-examining the hunchback in the Villa-Albani-Torlonia" in The Cambridge Classical Journal (New Series) December 2009 55 : pp 130–156; available as an academic reprint online
"Fiction". The Spectator Archive. Archived from the original on 2014-08-17.
studiaaurea.com
Antonio Bernat Vistarini, Tamás Sajó: Imago Veritatis. La circulación de la imagen simbólica entre fábula y emblema, Universitat de les Illes Balears, Studia Aurea 5 (2007), figures 2 and 1Archived 2011-02-22 at the Wayback Machine
Marceau, Lawrence. From Aesop to Esopo to Isopo: Adapting the Fables in Late Medieval Japan, 2009. See abstract at p. 277Archived 2012-03-22 at the Wayback Machine.
Marceau, Lawrence. From Aesop to Esopo to Isopo: Adapting the Fables in Late Medieval Japan, 2009. See abstract at p. 277Archived 2012-03-22 at the Wayback Machine.
van Dijk, Geert. "Aesop" in Encyclopedia of Ancient Greece, New York, 2006, p. 18.Archived 2016-12-29 at the Wayback Machine
Antonio Bernat Vistarini, Tamás Sajó: Imago Veritatis. La circulación de la imagen simbólica entre fábula y emblema, Universitat de les Illes Balears, Studia Aurea 5 (2007), figures 2 and 1Archived 2011-02-22 at the Wayback Machine