1. BERGGREN, L. (1960). Actaphysiol. scand., 48, 461.
2. COLE, D. F. (1959). Brit. J. Ophthal., 43, 268.
3. COLE, D. F. (1960). Ibid., 44, 739.
4. COLE, D. F. (1961). Ibid., 45, 202.
5. In " Metabolic Aspects of Transport across Cell Membranes ";CONwAY, E.J.,1957