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Han, Sang-Jun; Yoo, Miran; Kim, Dong-Woo; Wee, Jung-Ho . (2011). Carbon Dioxide Capture Using Calcium Hydroxide Aqueous Solution as the Absorbent. Energy & Fuels, 25(8), 3825–3834. doi:10.1021/ef200415p 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research