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Song, Guobao; Che, Li; Zhang, Shushen . (2016). Carbon footprint of a scientific publication: A case study at Dalian University of Technology, China. Ecological Indicators, 60(), 275–282. doi:10.1016/j.ecolind.2015.06.044 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research