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Jia, Lili; Qin, Yujie; Wang, Jia; Zhang, Junhua . (2020). Lignin extracted by γ-valerolactone/water from corn stover improves cellulose enzymatic hydrolysis. Bioresource Technology, (), 122901–. doi:10.1016/j.biortech.2020.122901 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research