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Davids, Paul S.; Kirsch, Jared; Starbuck, Andrew; Jarecki, Robert; Shank, Joshua; Peters, David . (2020). Electrical power generation from moderate-temperature radiative thermal sources. Science, (), eaba2089–. doi:10.1126/science.aba2089 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research