1. Pincus, P., Nature, 138, 970 (1936).
2. Levene, P. A., "Hexosamines and Mucoproteins" (Longmans, Green, London, 1925).
3. Wassermann, F., J. Dent. Research, 23, 463 (1944).
4. Meyer, K., and Smyth, E. M., J. Biol. Chem., 119, 507 (1937).
5. Neuberg, C., and Cahill, W., Rend. Accad. Lincei, 22, 149 (1935).