1. Hegel
2. Eldridge, Richard (2012), G. W. F. Hegel. In: Aesthetics the Thinker, Edited by Giovanni Alessandro, New York: Continuum Press.
3. Fullerton, Mark D. (2016), Greek Sculpture, New York: Wiley Blackwell.
4. Hegel, G.W.F (1971), Philosophy of Mind: part three of the Encyclopedia of the Philosophical Sciences, Trans. W. Wallace and A. V. Miller, New York: Oxford University Press.