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Colin A. Chapman; Michaela L. Speirs; Thomas R. Gillespie; Timothy Holland; Kiersten M. Austad. (2006). Life on the edge: gastrointestinal parasites from the forest edge and interior primate groups. , 68(4), 397–409. doi:10.1002/ajp.20233 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research