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Pastor, Adrián; Balbuena, José; Cruz-Yusta, Manuel; Pavlovic, Ivana; Sánchez, Luis . (2019). ZnO on rice husk: a sustainable photocatalyst for urban air purification. Chemical Engineering Journal, (), S1385894719304711–. doi:10.1016/j.cej.2019.03.012 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research