1. The Merck Index, 12th edn., S. Budavari, ed., Merck and Co, N.J., p. 172 (1996)
2. Martindale, The Complete Drug Reference, 32nd edn., K. Parfitt, ed., The Pharmaceutical Press, Massachusetts, p. 808, 827 (2002)
3. Remington’s: The Science and Practice of Pharmacy, 19th edn., Volume II, A.R. Gennaro, ed., Mack Publishing Co., Pennsylvania, p. 950 (1995)
4. Index Nominum 2000, International Drug Directory, 17th edn., Swiss Pharmaceutical Society, ed., Medpharm GmbH Scientifc Publishers Stuttgart, p. 97 (2000)