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Li, Na; Ma, Xingxia; Xu, Hongwei; Feng, Yongzhong; Ren, Guangxin; Yang, Gaihe; Han, Xinhui; Wang, Xiaojiao; Ren, Chengjie . (2020). Biochar addition mitigates nitrogen loss induced by straw incorporation and nitrogen fertilizer application. Soil Use and Management, (), sum.12642–. doi:10.1111/sum.12642 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research