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Fernández-García, A.; Díaz-Franco, R.; Martinez, L.; Wette, J. . (2014). Study of the Effect of Acid Atmospheres in Solar Reflectors Durability under Accelerated Aging Conditions. Energy Procedia, 49(), 1682–1691. doi:10.1016/j.egypro.2014.03.177 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research