1. Redslob, E. (1932) Le corps vitré, Masson & Cie, Paris, pp. 299–305.
2. Duke-Elder, W.S. (1929) The physico-chemical properties of the vitréous body. J. Physiol, 68, 155–65.
3. Nordmann, J. (1968) Chimie, in Biologie et chirurgie du corps vitré, (eds A. Brini, A. Bronner, J.P. Gerhard et al.), Masson & Cie, Paris, pp. 95–167.
4. Mörner, C.T. (1894) Untersuchung der Proteinsubstanzen in den lichtbrechenden Medien des Auges. Z. Physiol. Chem., 18, 233–56.
5. Gala, A. (1925) Observations on the hydrogen ion concentration in the vitreous body of the eye with reference to glaucoma. Br. J. Ophthalmol, 9, 516–9.