1. Block, N. (1990). Can the mind change the world? In George Boolos (Ed.), Meaning and method: Essays in honor of Hilary Putnam (pp. 137–170). Cambridge: Cambridge University Press.
2. Descartes, R. (1989). The passions of the soul (Les Passions de l’Ame). Indianapolis: Hackett Publishing Company. http://www.earlymoderntexts.com/pdfs/descartes1649.pdf . Accessed 13 Jan 2015.
3. Campbell, K. (1984). Body and Mind (Second Edition). Notre Dame, Indiana: University of Notre Dame Press.
4. Hume, D. (1955). In C. W. Hendel (Ed.), An inquiry concerning human understanding. New York: Macmillan.
5. Huxley, T. H. 2011 (1874). On the hypothesis that animals are automata, and its history. Journal of Cosmology 14. http://journalofcosmology.com/Consciousness137.html . Accessed 13 Jan 2015.