1. “Environmental Health Criteria 2; Polychlorinated Biphenyls and Terphenyls,” World Health Organization, Geneva, 1976, p. 18.
2. S. Ochoa, in “Methods in Enzymology,” Vol. 1, ed. by S. P. Colowick and N. O. Kaplan, Academic Press, New York, 1955, pp. 739–753.
3. G. W. Snedecoor and W. G. Cochran, “Statistical Methods,” 6th edition, The Iowa State University Press, Ames, 1967.