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Shott, Michael J.; Seeman, Mark F. . (2015). Curation and recycling: Estimating Paleoindian endscraper curation rates at Nobles Pond, Ohio, USA. Quaternary International, 361(), 319–331. doi:10.1016/j.quaint.2014.06.023 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research