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Kim, Bora; Yang, Jeongwoo; Kim, Minji; Lee, Jae W. . (2020). One-pot selective production of levulinic acid and formic acid from spent coffee grounds in a catalyst-free biphasic system. Bioresource Technology, (), 122898–. doi:10.1016/j.biortech.2020.122898 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research