1. P. Carpentier,Compt. Rend. 1945,225, 306.
2. O. Nieschulz, I. Hofmann, K. Popendiker,Arzneimittel Forsch. 1960,10, 156.
3. Martindale, The Extra Pharmacopeia, 29th Ed, Pharmaceutical Press, London, 1989, p. 706.
4. The Pharmaceutical Codex Incorporating the British Pharmaceutical Codex, 11th Ed., Pharmaceutical Press, London, 1979.
5. American Medical Association,New Drugs Chicago, 1967, p. 121.