1. Baker, L.R. 2007. The metaphysics of everyday life: An essay in practical realism. Cambridge: Cambridge University Press.
2. Bird, A., and E. Tobin, 2016. Natural kinds. In The Stanford Encyclopedia of Philosophy, ed. E. N. Zalta,
https://plato.stanford.edu/archives/win2016/entries/natural-kinds/
.
3. Bloom, P. 1998. Theories of artifact categorization. Cognition 66: 87–93.
4. Brey, P. 2000. Theories of technology as extensions of human faculties. In Metaphysics, epistemology and technology. Research in philosophy and technology, ed. C. Mitcham, vol. 19, 59–78. London: Elsevier/JAI press.
5. Brey, P. 2005. The epistemology and ontology of human-computer interaction. Minds & Machines 15: 383–398 Carr.