1. U. S Food and Drug Administration Drug Shortages http://www.fda.gov/DrugS/DrugSafety/DrugShortages/default.htm
2. Critical drug shortages: implications for emergency medicine;Mazer-Amirshahi;Acad Emerg Med,2014
3. U.S. Food and Drug Administration A Review of FDA's Approach to Medical Product Shortages http://www.fda.gov/DrugShortageReport
4. Economic and technical drivers of generic sterile injectable drug shortages;Woodcock;Clin Pharmacol Ther,2003