1. Cole, L. J., and Ellis, M. E., Radiat. Res., 7, 508 (1957).
2. Hagen, U., Nature, 187, 1123 (1960).
3. Bauer, R. D., Dreher, K., and Kurnick, N. B., Radiat. Res., 20, 24 (1963).
4. Skalka, M., Matyášová, J., and Soška, J., Proc. Symp. Biological Effects of Ionizing Radiation at the Molecular Level, 323 (IAEA, Vienna, 1962).
5. Skalka, M., and Matyášová, J., Intern. J. Rad. Biol., 7, 41 (1963).