1. State Pharmacopoiea of the USSR [in Russian], 10th Edition, Moscow (1968).
2. M. A. M. E1-Said, Farmatslya, No. 3, 72–76 (1968).
3. Yu. I. Zelikson, Ibid., No. 2, 39–42 (1969).
4. L. K. Karpova, Ibid., No. 4, 39–41 (1967).
5. I. P. Koka, Ibid., No. 6, 49–51 (1980).