|Francis-Bacon's three studies for a portrait of John Edwards|
Avinoam B. Safran, Nicolae Sanda and José-Alain Sahel (2012) Francis Bacon’s Distorted Representation of Faces Presumably Reflects Occipital Dysfunction. Investigative Ophthalmology & Visual Science 2012; 53: E-Abstract 4846.
Francis-Bacon's three studies for a portrait of John Edwards
A twist in the tale of Bacon's faces, News, The Sunday Times, 12 April 2015: p.6.