Franco Mormando, 'Just as your lips approach the lips of your brothers: Judas Iscariot and the Kiss of Betrayal' in F. Mormando, ed., Saints and Sinners: Caravaggio and the Baroque Image (Chicago: Distrib. by University of Chicago Press, 1999), p. 183. Mormando's essay gives an overview of contemporary commentary on the scene of the betrayal of Judas in the most popular spiritual literature available to Caravaggio as he prepared to depict this scene.
humphrysfamilytree.com
Humphrys, Mark. "Dr. Nora Stack". HumphrysFamilyTree.com. Retrieved 6 February 2009.
Walsh, Elaine. "A Picture Of Mystery". irishletter.com. For Fr. Barber's own first-person account of the events that led up to the rediscovery, see his essay, "The Murder Behind the Discovery," in Franco Mormando, ed., Saints and Sinners: Caravaggio and the Baroque Image, exhibition catalogue (Chestnut Hill, MA: McMullen Museum of Boston College, 1999), pp. 11-13.
jstor.org
Herrmann Fiore, Kristina (January 1995). "Caravaggio's 'Taking of Christ' and Dürer's Woodcut of 1509". The Burlington Magazine. 137 (112): 24–27. JSTOR886401.