References
- The United States Pharmacopoeia. 18. 1970; 932
- British Pharmacopoeia. 1973; A131
- U.S. National Formulary. 13. 1970; 803
- The Pharmacopoeia of Japan. 8. 1971; 856
- Dibbern H. W., Wirbitzki E. Pharm. Z. 1971; 48: 1848
- Olson C. L. U.S. patent. 797965, (1969)
- Baun D. C., Walker G. C. J. Pharm. Sci. 1969; 58: 611
- Langenbucher F. J. Pharm. Sci. 1969; 58: 1265
- Tingstad J. E., Riegelman S. J. Pharm. Sci. 1970; 59: 692