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Wongpairojpanich, Jirapa; Kijartorn, Pennapa; Suwanprateeb, Jintamai; Buranawat, Borvornwut . (2020). Effectiveness of bilayer porous polyethylene membrane for alveolar ridge preservation: A randomized controlled trial. Clinical Implant Dentistry and Related Research, (), cid.12965–. doi:10.1111/cid.12965 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research