1. B. I. Blankov and D. L. Klebanov, Application of lyophilization in microbiology [in Russian], Moscow, (1961). p. 185.
2. G. Ya. Kagan and V. S. Levashov, Zh. mikrobiol.,12, (1959), p. 68.
3. M. N. Lebedeva and S. D. Voropaeva,Ibid., No. 11, (1957), p. 26.
4. V. S. Levashov, Biological properties of regenerated filterable G- and L-forms of Mechnikov's vibrio andP. vulgaris [in Russian], Diss. kand. Moscow, (1956).
5. V. S. Levashov, Z. A. Pesina, and D.Y. Karpilovskaya, Thesis lecture at the Fourth All-Union Urology Conference [in Russian], Moscow, (1961), p. 68.