1. S. E. Kaplan, Transactions of the Academy of Medical Sciences of the USSSR [in Russian], Vol. 13, No. 2, Moscow (1950), p. 123.
2. G. N. Pershin, G. P. Belikov, A. I. Yakovleva, et al., Vopr. Virusol., No. 5, 574 (1963).
3. P. D. Starshov, Vopr med. Khimii, No. 2, 169 (1962); in the book: Proceedings of the Second Conference on Clinical Biochemistry of Infectious Diseases and of a Symposium on the Clinical Biochemistry of Diseases of the Liver [in Russian], Riga, 185 (1963), pp. 182; Transactions of the Military Medical Academy [in Russian], Leningrad,156, 47 (1964), pp. 35.
4. L. A. Cherkes, Klin. Med., No. 2, 12 (1951).
5. A. Aschkenasy and J. Mignot, C. R. Soc. Biol., 140 (1946), p. 208.