1. Bateson, G. (1972). Steps to an ecology of mind. Chicago, IL: University of Chicago Press.
2. Bell, C. (1991). Ritual theory, ritual practice. New York: Oxford University Press.
3. Coles, A. (2014). Transitional devices. For the Learning of Mathematics, 34(2), 24–30.
4. Coles, A., & Sinclair, N. (2017). Re-thinking place value: From metaphor to metonym. For the Learning of Mathematics, 37(1), 3–8.
5. de Freitas, E., & Sinclair, N. (2014). Mathematics and the body: Material entanglements in the mathematics classroom. New York, NY: Cambridge University Press.