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KYLA F. ORTVED; URSULA KROTSCHECK; SAMANTHA A. COLLINS; JEREMY J. RAWLINSON; JONATHAN DYCE. (2009). Cementless Total Hip Replacement in an Alpaca. , 38(5), 583–587. doi:10.1111/j.1532-950x.2009.00542.x 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research