1. J. PROKOP, K. SVOBODA, F. BUDSKÝ, Proc. IV. Intern. Symp. Radiopharmaceutical Chemistry, Jülich, 1982, p. 291; J. Label. Comp. Radiopharm., 19 (1982) 1563.
2. J. MARHOLD, Review of Industrial Toxicology (in Czech), SZN-publishing-house, Prague, 1964, p. 143.
3. O. RIEDL, V. VONDRÁČEK, Clinical Toxicology (in Czech), Avicenum, Prague, 1980, p. 471.
4. V. HUŠÁK, J. VLČEK, Intern. J. Appl. Radiation Isotopes, 30 (1979) 165.
5. S. C. SRIVASTAVA, G. MEINKEN, T. D. SMITH, P. RICHARDS, Intern. J. Appl. Radiation Isotopes, 28 (1977) 83.