1. The Drug Price Competition and Patent Term Restoration Act of 1984 (Public Law 98-417). http://www.gpo.gov/fdsys/pkg/STATUTE-98/pdf/STATUTE-98-Pg1585.pdf . Accessed 12 Feb 2015.
2. Generic Pharmaceutical Association (GPhA). Generic drug savings in the U.S. Sixth annual edition. 2014. http://www.gphaonline.org/media/cms/GPhA_Savings_Report.9.10.14_FINAL.pdf . Accessed 12 Feb 2015.
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4. IMS Institute for Healthcare Informatics. Medicine use and shifting costs of healthcare: a review of the use of medicines in the United States in 2013. http://www.imshealth.com/deployedfiles/imshealth/Global/Content/Corporate/IMS%20Health%20Institute/Reports/Secure/IIHI_US_Use_of_Meds_for_2013.pdf . Accessed 12 Feb 2015.
5. The Medicare Prescription Drug, Improvement and Modernization Act of 2003; Title XI—access to affordable pharmaceuticals. http://www.gpo.gov/fdsys/pkg/PLAW-108publ173/pdf/PLAW-108publ173.pdf . Accessed 12 Feb 2015.