1. State Pharmacopoeia of the USSR [in Russian], Xth edition, Moscow (1968), pp. 678–679.
2. A. A. Fernandes,J. Pharm. Sci.,58, 443–446 (1969).
3. P. P. Apcion, J. D. Zagar, G. P. Chrekian, et al.,J. Pharm. Sci.,59, 1480–1483 (1970).
4. V. G. Belikov,Pharmaceutical Chemistry [in Russian], Moscow (1985), pp. 698–704.
5. Antibiotics [in Russian], Moscow (1969), pp. 287–324.