1. Alexander, V. N. (2009). The poetics of purpose. Biosemiotics, 2(1), 77–100.
2. Aristotle (c. 350 BC/[1993]). De Anima: Books II and III. Hamlyn, D. W., & Shields, C. J. (Eds.). Oxford: Oxford University Press.
3. Bailey, C. (2011). The genesis of existentials in animal life: Heidegger’s appropriation of Aristotle’s ontology of life. Heidegger Circle Proceedings, 1(1), 199–212.
4. Bateson, G. (1972). Steps to an ecology of mind: Collected essays in anthropology, psychiatry, evolution, and epistemology. Chicago: University of Chicago Press.
5. Brentano, F. (1874/[1995]). Psychology from an empirical standpoint. London: Routledge.