1. Agriculture and Agri-Food Canada (AAFC) 2011 Statistics of the Canadian dairy industry, 2011 edition http://www.dairyinfo.gc.ca/pdf/publication_2011edition.pdf
2. Agriculture and Agri-Food Canada (AAFC) 2012 Statistics of the Canadian dairy industry, 2012 edition http://www.dairyinfo.gc.ca/pdf/publication_2012edition.pdf
3. Uncertainty, evolution and economic theory;Alchian;J. Pol. Econ,1950
4. Bank of Canada 2012 Historical data http://www.bankofcanada.ca/rates/indicators/capacity-and-inflation-pressures/inflation/historical-data/
5. The function of several property and freedom of contract;Barnett;Soc. Philos. Policy,1992