1. State Pharmacopoeia of the USSR [in Russian], 10th Edition, Moscow (1968), p. 455.
2. A. P. Kreshkov, Principles of Analytical Chemistry [in Russian], Moscow (1965), p. 119.
3. Yu. V. Markova, K. K. Kuz'mina, and M. N. Shchukina, Chemistry and Medicine [in Russian], No. 11, Moscow: Leningrad (1959), p. 39.
4. GFR Patent No. 869066 (1953); Chem. Abst.,43, 11485 (1954).
5. L. A. Tiunov, G. A. Vasil'ev, and V. P. Paribok, Antiradiation Agents [in Russian], Moscow; Leningrad (1961), p. 120.