1. Biernoff, S. (2008). Seeing and feeling in the middle ages. In E.Edwards & K.Bhaumik (Eds.), Visual sense (pp. 51–61). Oxford: Berg.
2. Bion, W. R. (1962). Learning from experience. London: Karnac.
3. Buber, M. (1923/1999). I and thou. (R.G. Smith, Trans.).London: Clarke.
4. Collingwood, R. G. (1938/1963). The principles of art. Oxford: Clarendon.