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2. The United States Pharmacopeial Convention, White Paper: Modernization of Organic Impurities Testing in USP Drug Product Monographs, The United States Pharmacopeial Convention, Rockville, Maryland. 2013. http://www.usp.org/usp-nf/key-issues/monograph-modernization/organic-impurities-drug-monographs/white-paper-modernization-organic-impurities.
3. The United States Pharmacopeial Convention, The United States Pharmacopoeia–National Formulary, USP38–NF 33, 2015, Metoprolol Succinate, p. 4370.
4. EDQM, European Pharmacopeia 8.5, 8th Edition, 2015, Metoprolol Succinate, p. 4784.
5. USP monograph modernization initiative;Santos;Am. Pharm. Rev.,2015