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Zhang, Bing; Chen, Mengmeng; Pu, Shi; Chen, Ling; Zhang, Xing; Zhang, Jing; Zhu, Chuanshu . (2020). Identification of secondary metabolites in Tripterygium wilfordii hairy roots and culture optimization for enhancing wilforgine and wilforine production. Industrial Crops and Products, 148(), 112276–. doi:10.1016/j.indcrop.2020.112276 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research