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2. Solarbuzz, Solar Market Research and Analysis, Solar Electricity Prices, June 2011, Available at: 〈http://solarbuzz.com/facts-and-figures/retail-price-environment/solar-electricity-prices〉
3. U.S. Department of Energy, Energy Information Administration: Electric Power Monthly, June 2011, Available at: 〈http://www.eia.gov/cneaf/electricity/epm/epm_sum.html〉
4. First Solar Press Release. Company Cuts Manufacturing Cost to 98 Cents per Watt in Fourth Quarter, 2009, Available at: 〈http://investor.firstsolar.com/phoenix.zhtml?c=201491&p=irol-newsArticle&ID=1259614&highlight=〉
5. Reconsidering solar grid parity