1. A. K. Boikov, in: Regenerative and Proliferative Processes in Animals [in Russian], Moscow (1968), p. 106.
2. G. D. Knyazeva and M. M. Morozova, Arkh. Pat., No. 4, 47 (1972).
3. I. A. Morozov, Arkh. Pat., No. 8, 78 (1971).
4. L. K. Romanova, E. M. Leikina, and K. K. Antipova, Byull. Éksp. Biol. Med., No. 3, 96 (1967).
5. L. K. Romanova and A. K. Boikov, in: Proceedings of an All-Union Conference of Electron-Microscopic Investigation of Cells and Tissues [in Russian], Leningrad (1968), p. 116.