1. W. MERTZ, Physiol. Rev., 49 (1969) 163.
2. L. McCLENDON, Trace Subst. Environ. Health, 8 (1974) 255.
3. D. A. BECKER, G. W. SMITH, Modern Trends in Activation Analysis Conference, College Station, Texas, 1965 p. 230.
4. J. PIERCE, et al., Symp. on the Development of Nucl. Based Tech. for Meas., Detection and Control of Environ. Pollutants, Vienna, Mar. 1976.
5. R. PARR, Modern Trends in Activation Analysis Conference, Munich, 1976 p. 1414; J. Radioanal Chem., 00 (1977) 00.