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Zhou, Xian-Mei; Wen, Gao-Yan; Zhao, Yang; Liu, Yu-Mei; Li, Jian-Xin . (2013). Inhibitory effects of alkaline extract of Citrus reticulata on pulmonary fibrosis. Journal of Ethnopharmacology, 146(1), 372–378. doi:10.1016/j.jep.2013.01.006 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research