1. P. Z. Budnitskaya, in: Pyrogenal [in Russian], Moscow (1965), p. 17.
2. P. N. Veselkikin, in: Pyrogenal [in Russian], Moscow (1965), p. 7.
3. G. M. Daudova, in: Annual Report of the Institute of Experimental Medicine, Academy of Medical Sciences of the USSR, for 1960 [in Russian], Leningrad (1961), p. 320.
4. E. P. Zdrodovskaya, in: Phosphorylation and Function [in Russian], Leningrad (1960), p. 336.
5. S. R. Mardashev and V. A. Burobin, Vopr. Med. Khimii, No. 3, 320 (1962).