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Durán-Jiménez, G.; Hernández-Montoya, V.; Montes-Morán, M.A.; Rangel-Méndez, J.R.; Tovar-Gómez, R. . (2016). Study of the adsorption-desorption of Cu2+, Cd2+ and Zn2+ in single and binary aqueous solutions using oxygenated carbons prepared by Microwave Technology. Journal of Molecular Liquids, 220(), 855–864. doi:10.1016/j.molliq.2016.05.027 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research