1. Jayle, M. F., and Boussier, G. M., Bull. Soc. Chim. Biol., 36, 959 (1954).
2. Jayle, M. F., Boussier, G. M., and Tonnelat, J., Bull. Soc. Chim. Biol., 38, 343 (1956).
3. Laurell, C. B., Acta Clin. Chim., 4, 79 (1959).
4. Heremans, J., Fourth Coll. St. John's Hospital, Bruges, Belgium (1956).
5. Nitschmann, H., Kistler, P., and Lergier, H., Helv. Chim. Acta, 37, 866 (1954).