1. L. Ya. Blyakher, Transactions of the Research Institute of Experimental Morphogenesis [in Russian],5, Moscow (1936), p. 91.
2. M. A. Vorontsova, Regeneration of Lost Organs in Animals and Man [in Russian], Moscow (1953).
3. V. N. Zamaraev, In the book: Scientific Publications of Kalinin Branch of Moscow Society of Naturalists [in Russian], No. 2, p. 169, Moscow (1960).
4. V. N. Zamaraev, In the book: Scientific Publications of Kalinin Branch of Moscow Society of Naturalists [in Russian], No. 2, p. 175, Moscow (1960).
5. B. E. Movshev Pat. Fiziol., No. 3, 57 (1964).