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Qi, Fangjie; Dong, Zhaomin; Lamb, Dane; Naidu, Ravi; Bolan, Nanthi S.; Ok, Yong Sik; Liu, Cuixia; Khan, Naser; Johir, M.A.H.; Semple, Kirk T. . (2017). Effects of acidic and neutral biochars on properties and cadmium retention of soils. Chemosphere, 180(), 564–573. doi:10.1016/j.chemosphere.2017.04.014 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research