1. Abrash, Merritt. “‘R.U.R.’ Restored and Reconsidered”, Extrapolation 32.2 (1991): 184–92.
2. Atkinson, Brooks and Hirschfeld, Albert. The Lively Years, 1920–1973. New York: New York Association Press, 1973.
3. Benjamin, Walter. “The Work of Art in the Age of Mechanical Reproduction”:
http://web.bentley.edu
empl/c/rcrooks/toolbox/common_knowledge/general_communication/benjamin.html (accessed 6 December 2008).
4. —. Das Kunstwerk im Zeitalter seiner technischen Reproduzierbarkeit. Frankfurt am Main: Suhrkamp, 1970.
5. Berger, Arthur. “Sign, self and society”. In Semiotic Bridge: Trends from California. Irmengard Rauch and Gerald F. Carr (eds). Berlin: Mouton de Gruyter, 1989, pp. 1–9.