1. Fivy, K., Syed, A., Syed, S., and Syed, W.G., Int. J. Pharm. Pharm. Sci., 2012, vol. 4, p. 733.
2. Enoche, F.O., Int. J. Pharm. Pharm. Sci., 2010, vol. 2, p. 55.
3. Indian Pharmacopoeia, Delhi: The controller of publications, 1996, vol. 2, p. 665.
4. Indian Pharmacopoeia, Delhi: The controller of publications, 1996, vol. 2, p. 408.
5. Indian Pharmacopoeia, Delhi: The controller of publications, 1996, vol. 2, p. 644.