Dennett, D. C. (1991). Consciousness explained. New York: Little, Brown & Co.
2.
Littlewood, R. (1996). Reason and necessity in the specification of the multiple self. Royal Anthropological Institute Occasional Paper 43. London: RAI.
3.
Mack, J. (1994). Abductions: human encounters with aliens. New York: Simon & Schuster.
4.
Micale, M. (1995). Approaching hysteria: disease and its interpretations. Princeton, NJ: Princeton University Press.
5.
Rowan, J. (1990). Subpersonalities: The people within us. London: Routledge.
6.
Showalter, E. (1987). The female malady: women, madness and English culture 1830-1980. London: Virago.