1. Goodman & Gilman's the Pharmacological Basis of Therapeutics;Goodman, L.,2006
2. British Pharmacopoeia,2017
3. United States Pharmacopeial Convention;United States Pharmacopeia,2010
4. The 50th anniversary of the discovery of 6-aminopenicillanic acid;Rolinson, G.,2007
5. Report of the Situation of Counterfeit Medicines Based on Data Collection Tool;World health organization,2010