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Wang, Shouchuang; Tu, Hong; Wan, Jian; Chen, Wei; Liu, Xianqing; Luo, Jie; Xu, Juan; Zhang, Hongyan . (2016). Spatio-temporal distribution and natural variation of metabolites in citrus fruits. Food Chemistry, 199(), 8–17. doi:10.1016/j.foodchem.2015.11.113 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research