1. V. I. Evsyukov, Byull. Éksperim. Biol. i Med., No. 2, 106 (1965).
2. N. V. Kozlova, Dokl. Akad. Nauk SSSR,127, No. 5, 1121 (1959).
3. N. V. Kozlova, Med. Radiol., No. 5, 75 (1960).
4. G. S. Strelin, Med. Radiol., No. 2, 77 (1960).
5. G. S. Strelin and E. M. Pil'shchik, in: Problems in Radiology [in Russian], Vol. 3, Leningrad (1960), p. 188.