1. Anscombe, G. E. M. (1957). Intention. Oxford: Blackwell.
2. Apperly, I. A., & Butterfill, S. A. (2009). Do humans have two systems to track beliefs and belief-like states? Psychological Review,
116, 953–970.
3. Bishop, J. C. (1989). Natural agency: An essay on the causal theory of action. Cambridge: Cambridge University Press.
4. Boyd, R. (1991). Realism, anti-foundationalism and the enthusiasm for natural kinds. Philosophical Studies,
61, 127–148.
5. Boyd, R. (1999). Homeostasis, species, and higher taxa. In R. A. Wilson (Ed.), Species: New interdisciplinary essays (pp. 141–185). Cambridge: MIT Press.