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2. Remington: The Science and Practice of Pharmacy;Gennaro,1995
3. The Pharmacopoeia of the United States of America, 18th ed., United States Pharmacopoeial Convention, Inc., Easton, 1970.
4. Assay of Official Injections of Amine Salts
5. British Pharmacopoeia, HMSO, London, 1993, p. 886.