References
- Sheth P. R., Tossounian J. L., U. S. Patent No. h,126,672, dated November 21, 1978
- Documenta Geigy 6th Ed. BasleSwitzerland 1962
- Casey D. L., Beihn R. M., Digenis G. A., Shambu M. B. J. Pharm. Sci. 1976; 65: 1412
- Schwartz J. B., Simonelli A. P., Higuchi W. 1. J. Pharm. Sci. 1968; 57: 274
- Touitou E., Donbrow M. Int. J. Pharm. 1982; 11: 131
- Ibid 1982; 11: 355