Guy Jolyon Bradley, Ancient Umbria: State, Culture, and Identity in Central Italy from the Iron Age to the Augustan Era (Oxford University Press, 2000), p. 56 online.
Peter Brown, entry on "Pagan", Late Antiquity: A Guide to the Postclassical World, edited by G.W. Bowersock, Peter Brown, and Oleg Grabar (Harvard University Press, 1999), p. 625 online: "The adoption of paganus by Latin Christians as an all-embracing, pejorative term for polytheists represents an unforeseen and singularly long-lasting victory, within a religious group, of a word of Latin slang originally devoid of religious meaning. The evolution occurred only in the Latin west, and in connection with the Latin church. Elsewhere, 'Hellene' or 'gentile' (ethnikos) remained the word for 'pagan'; and paganos continued as a purely secular term, with overtones of the inferior and the commonplace."
