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Xie, Xiaobing; Shan, Shuanglü; Wang, Yumei; Cao, Fangbo; Chen, Jiana; Huang, Min; Zou, Yingbin . (2019). Dense planting with reducing nitrogen rate increased grain yield and nitrogen use efficiency in two hybrid rice varieties across two light conditions. Field Crops Research, 236(), 24–32. doi:10.1016/j.fcr.2019.03.010 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research