3Prescription Drug Prices in Canada, Europe, Japan and the United States.http://www.house.gov/reform/min/pdfs/pdf_inves/pdf_prescrip_price_countries_rep.pdf
4John R. Graham. The Fantasy of Reference Pricing and the Promise of Choice in BC's Pharmacare. Http://www.fraserinstitute.ca/admin/books/files/Fantasy.pdf
5Risk handing and financing in pharmaceutical enterprise. http://www.swissre.com/INTERNET/pwsfilpr.nsf/vwFilebyIDKEYLu/MBAR-4UZJPE/$FILE/risk.Paras.0005.File.pdf