1. Svensson, G. K., Liden, K.: Health Phys. 11, 1393 (1965)
2. Richardson, D. H. S.: The Biology of Mosses. Oxford: Blackwell 1981
3. Biró, T., Fehér, L, Sztanyik, L. B.: Radiation Consequences in Hungary of the Chernobyl Accident. Budapest: Hungarian Atomic Energy Commission 1986