1. Anzieu, D, 1995, Le moi-peau. Paris: Dunod.
2. Bell, C, 1824, Essays on the anatomy and philosophy of expression (2nd ed.). London: Murray.
3. Benthien, C, 1999, Haut. Hamburg: Rowohlt Taschenbuch Verlag GmbH.
4. Berlin, B. and Kay, P, 1969, Basic color terms. Berkeley: University of California Press.
5. Boehm, C, 2012, Moral origins: The evolution of virtue, altruism, and shame. New York: Basic Books.