1. The Problem of the Unity of Science
2. Antonietti, A., Corradini, A. and Lowe, E. J. (eds.). 2008. Psycho-Physical Dualism Today. New York: Lexington.
3. Arnold, D. (ed.). 2014. Traditions of Systems Theory: Major Figures and Contemporary Developments. New York: Routledge.
4. Barber, T. 1993. The Human Nature of Birds. New York: Penguin.
5. Bartal, I. B.A., Decety, J. and Mason, P. 2011. “Empathy and pro-social behavior in rats.” Science 334 (6o61): 1427-30.