William Tecumseh Fitch, "The 24th Kanizsa Lecture" in: Paolo Bernardis, Carlo Fantoni, Walter Gerbino (eds.) "TSPC2016: Proceedings of the Trieste Symposium on Perception and Cognition, November 4th 2016", Trieste, EUT Edizioni Università di Trieste, 2016, pp. 11-13.
