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2. Fundamentals of Nuclear Science and Engineering;Shultis,2002
3. Solar radiation spectrum;Gueymard,2012
4. Historical Perspectives of Energy Consumption, Retrieved from, https://people.wou.edu/~courtna/GS361/electricity%20generation/HistoricalPerspectives.htm
5. Appendix 2. Estimated calorie needs per day, by age, sex, and physical activity level. (2015). Retrieved from https://health.gov/our-work/food-nutrition/2015-2020-dietary-guidelines/guidelines/appendix-2/#footnote-1