1. Zelnicek, E., Scripta medica fac. med. univ. Brunensis et Olomucensis, 30, 291 (1957).
2. Zelnicek, E., and Cernoch, K., Cas. lék. čes., 97, 188 (1958).
3. El Hawary, M. S. F., and Thompson, R. H. S., Biochem. J., 53, 340 (1953).
4. Biserte, G., and Dassonville, B., Clin. Chim. Acta, 1, 49 (1956).
5. McArdle, B., Biochem. J., 66, 144 (1957).