(en) Nikita Prokhorov, Ambigrams Revealed : A Graphic Designer's Guide To Creating Typographic Art Using Optical Illusions, Symmetry, and Visual Perception, New Riders, , 162 p. (ISBN978-0-13-308646-1, lire en ligne)
I. C. McManus, Matthew Freegard, James Moore et Richard Rawles, « Science in the Making: Right Hand, Left Hand. II: The duck–rabbit figure », Laterality, vol. 15, nos 1–2, , p. 166–85 (PMID19142793, DOI10.1080/13576500802564266, lire en ligne, consulté le )
I. C. McManus, Matthew Freegard, James Moore et Richard Rawles, « Science in the Making: Right Hand, Left Hand. II: The duck–rabbit figure », Laterality, vol. 15, nos 1–2, , p. 166–85 (PMID19142793, DOI10.1080/13576500802564266, lire en ligne, consulté le )
I. C. McManus, Matthew Freegard, James Moore et Richard Rawles, « Science in the Making: Right Hand, Left Hand. II: The duck–rabbit figure », Laterality, vol. 15, nos 1–2, , p. 166–85 (PMID19142793, DOI10.1080/13576500802564266, lire en ligne, consulté le )